On Thu, 24 Oct 2019 16:50:21 +0100, Mike Halmarack wrote:

It was in simple drill mode, but slipped into hammer mode, so I
paused, then pulling the trigger had no effect and and the function
selector switch wouldn't rotate to either drill mode or plain hammer
but stuck at drill with hammer.

Why did it slip into hammer mode?

Any catch required to be released to move the selector?
Tried twisting the chuck back and forth whilst trying to move the
selector?

--
Cheers
Dave.