Yes. LSE Derivatives D has a dedicated Corporate Action team, which works with other European exchanges to ensure its policy is following the highest international markets standards.
In case of interim, part of the dividend of year N is paid with record date XX and part is paid with record date YY, with YY later than XX. The second payment is not considered as an additional payment as it is just the second part of year's N dividend. Hence interim dividends will not be considered as extraordinary and no adjustment will be done.
In the case of a buyback, shares will be bought at the market price and then destroyed - hence, contracts will not be adjusted. In case of a partial public tender offer, if the last price of the shares is less then the tender offer price on the last day of acceptance, derivatives contracts will be adjusted according to the following formula:
PEX = [Pcum – (% of shares to be purchased) * ( tender offer price )]/(1–(% of shares to be purchased))
There would typically be no contract adjustments on derivatives contracts.