I've just put by Lightning back together - however I have to pull the trigger to allow it to latch during the cocking cycle.....obviously no right

I've had the trigger apart during the full strip down - I seem to have got something wrong in the re-assembly

Before I strip it again - Have any of the learned members come across this before or has any one got an ''idiots guide'' to this BSA trigger Mech.?

BTW I believe it to be a Birmingham built Lightning.

Many thanks in advance.

Steve