Hi again. Couldn't quite finish the 7th course.
All three spellings in my Chambers CD-ROM v.1 published 2003. BIDI, BEEDI, BEEDIE in that order. My paper Chambers published 1998 has none of them.
Looks like #2 is the only unsolved one. Say you've solved some of the 'crossers' and get:-
?A? ?????L??C?
Would this help?