SIR – The cold case investigation team and forensic scientists who have belatedly allowed the Metropolitan Police to bring to justice two of the men involved in the 1993 racist murder of Stephen Lawrence are to be congratulated for their thoroughness during this high profile and no expense spared investigation.

Perhaps it is now time for them to investigate with similar enthusiasm the death of Blair Peach, the New Zealand-born anti-racism campaigner who was knocked unconscious during a demonstration against the National Front in Southall on April 23, 1979 and died the next day?

Max Hey, Fairway Grove, Bradford