Himmler's death in British custody and the assassination theory

Could Heinrich Himmler have been killed in British custody to prevent information emerging at trial?

It is assessed as unlikely: the reported cyanide suicide fits the immediate account, and a covert killing would require preparation and secrecy for which this discussion offers no evidence.

The reported medical examination has Himmler resisting an attempt to inspect his mouth, biting a concealed cyanide capsule, and dying despite medical efforts. An unmarked burial is explained as a measure to prevent his grave becoming a political shrine. The claim of a British killing is assessed as unlikely because Britain wanted him alive for trial and the short interval after capture left little time to arrange a special operation. Covering every possible headquarters with a pre-positioned team would require extensive preparation and more people able to reveal the plan. Those are objections to the proposed conspiracy's motive and organization, rather than proof supplied by the mere absence of an exposed plot.