Technical library
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Millennium Exchange and TRADEcho Business Parameters
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Trading Technical Parameters
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Market Data Technical Parameters
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Service Technical Description – Request for Quote
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LSEG Third Country Member Transaction Reporting Guide (Venue Reporting)
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Third Country Member Transaction Reporting Testing Guide
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FCA’s Annual Transparency Calculations for equity and equity-like instruments
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Member Portal User Manual – Market Maker Registrations
Rules & Regulations
LSE 24
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LSE24 - Early Access Guide - Issue 01
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LSE24_MIT203 - Native Trading Gateway Specification - Issue 01
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LSE24_MIT202 - FIX Trading Gateway (FIX 5.0) - Issue 01
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LSE24_MIT205 - Drop Copy Gateway (FIX 5.0) - Issue 01
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LSE24_MIT204 - Post Trade Gateway (FIX 5.0) - Issue 01
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LSE24 MIT1001 Connectivity Guide Issue 1.0
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LSE 24 FAQs
Inside AIM Guidance
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Coronavirus – Update of financial reporting deadlines
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Coronavirus – Financial reporting deadlines
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Coronavirus – IFRS 16 Amendment
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Coronavirus – Temporary measures for publication of half-yearly reports
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Coronavirus - Temporary measures for publication of annual audited accounts
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Coronavirus - Temporary measures
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Staffing of Nominated Advisers
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AIM designated market route
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Preparation for corporate governance changes
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Interaction of social media with disclosure obligations under the AIM rules
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Market abuse regulation - Closed periods and preliminary results
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Preparation for market abuse regulation
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Market abuse regulation
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AIM company disclosures relating to equity financing products
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Regulation S, Category 3 Securities
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Consideration of free float
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Systems, Procedures and Controls – Financial Policies and Procedures
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Inside AIM Newsletter - Issue 1
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Inside AIM Newsletter - Issue 2
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Inside AIM Newsletter - Issue 3
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Inside AIM Newsletter - Issue 4
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Inside AIM Newsletter - Issue 5
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Index of AIM rules
Nominated Adviser forms
International Security Markets
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International Securities Market Rulebook
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Eligibility checklist for admission to trading
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Schedule 01 - Issuer disclosure : All securities
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Schedule 02 - Additional issuer disclosure for asset-backed securities and insurance linked securities
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Schedule 03 - Securities disclosure : All securities
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Schedule 04 - Additional securities disclosure for derivative securities
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Schedule 05 - Additional securities disclosure for asset-backed securities
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Schedule 06 - Additional securities disclosure for convertible securities
Service Announcements 2026
October
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CDS - 001 - 23102026 - TRADEcho Cloud and TP Customer Delivery Service (CDS) - Maintenance Day - Friday 30 October 2026
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CDS-001-14102026 London Stock Exchange – LSE 24 Customer Development Service (CDS) Launch
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LCDS - 001 - 13102026 - TRADEcho Cloud Legacy Customer Development Service (LCDS) – Maintenance Day – Friday 23 October 2026
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CDS - 001 - 16102026 - SIQ Customer Development Service (CDS) – Maintenance Day – Friday 16 October 2026
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LCDS- 001-02102026 -London Stock Exchange Legacy Customer Development Service (LCDS) – Maintenance Day – Thursday 8 October 2026
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CDS & LCDS - 003 - 01102026 - TRADEcho Cloud Customer Development Service (CDS) & Legacy Customer Development Service (LCDS) and TRADEcho Ticker Plant (TETP) Customer Development Service (CDS) & Legacy Customer Development Service (LCDS) – Maintenance Day
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LIVE - 002 - 01102026 - LSEG Member Portal Enhancements
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Live - 001 - 01102026 - Update to TRADEcho Services Price List effective 1 January 2027
September
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CDS - 001 - 22092026 - London Stock Exchange Customer Development Service (CDS) – Maintenance Day – Thursday 8 October 2026
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LIVE - 001 - 15092026 - Quarterly Review of Exchange Market Size (EMS) for Exchange Traded Products (ETPs)
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CDS - 001 - 11092026 - TRADEcho SIQ Customer Development Service (CDS) – Maintenance Day – Friday 18 September 2026
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CDS - 001 - 08092026 - London Stock Exchange and TRADEcho – New CDS MFT Portal URL
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CDS - 002 - 07092026 - TRADEcho Customer Development Service (CDS) – Maintenance Day – Friday 11 September 2026
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LIVE - 001 - 07092026 - September 2026 Quarterly Review
August
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LCDS - 001- 27082026 - TRADEcho Cloud Legacy Customer Development Service (LCDS) – Maintenance Day – Friday 4 September 2026
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CDS - 001 - 18082026 - London Stock Exchange Conformance Testing Tool - IP Address Change Notification
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LCDS & CDS - 001 - 12082026 - London Stock Exchange & TRADEcho Ticker Plant (TETP) Customer Development Service (CDS) & Legacy Customer Development Service (LCDS) – Maintenance Days – Thursday 20 to Friday 21 August 2026
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Live & CDS - 001 - 10082026 - London Stock Exchange Functional Release 1.26.9 Update
July
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LCDS - 001 - 28072026 - London Stock Exchange Legacy Customer Development Service (LCDS) – Down Days – Wednesday 29 to Friday 31 July 2026
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CDS - 001 - 23072026 - TRADEcho Cloud Customer Development Service (CDS) and SIQ Customer Development Service (CDS) – Maintenance Day – Friday 31 July 2026
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Live - 001 -21072026 - London Stock Exchange – Next Functional Release 1.26.9 Production Go-Live – 27 July 2026
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Live - 001 - 20072026 - Update to London Stock Exchange Trading Services Price List effective 01 August 2026
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Live - 001 - 13072026 - Update to London Stock Exchange Trading Services Price List effective 27 July 2026
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LCDS – 001 – 10072026 - TRADEcho Cloud Legacy Customer Development Service (LCDS) and TRADEcho Ticker Plant (TETP) Legacy Customer Development Service (LCDS) – Maintenance Day – Friday 17 July 2026
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Live - 001 - 08072026 - London Stock Exchange – Next Functional Release 1.26.9 Customer Dress Rehearsal (CDR) Guide
Main market admission
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Admission and Disclosure Standards
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Form 1 - Application for admission of securities to trading
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LSE early notification form
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When issue dealing application form
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Sustainable bond market issuer application
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Order book for retail bonds static data form
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Order book for fixed income static data form
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Issue of ETFs Main – Static Data form
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Issue of ETPs Main – Static Data form
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Equity Admission Requirements
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ETF / ETP Admission Requirements
