"Looking at Nutty in the British Library yesterday, I noticed there was a (fairly brief) villainess that Bananaman encountered in 1982 by the name of Yicky-Boo. Given John Geering’s connection to both Nutty and Cheeky this slightly shocked me, as he’d have surely told his editor about the similarity: they were both pests who yelled the same thing! I studied the speech panels closely to see if the female version was VICKY-Boo but no, spelt the same. This was late in 1982, by which time the party had been over for Cheeky for almost three years so perhaps someone thought they’d get away with it – or nobody would care. I did…"
Here are the strips in question drawn, as Stephen says, by John Geering;
I think we can allow Mr Geering the benefit of the doubt since, although he did draw for Cheeky Weekly, he never worked on the Cheeky pages so was quite possibly unaware of the original Yikky-Boo. John's no doubt busy schedule probably didn't allow him time to purchase and read all the comics in which his work appeared (he added swiftly, hoping to avoid legal action).
Bananaman is copyright DC Thomson & Co Ltd (he added even more swiftly).
P.S Yikky wasn't the only one to suffer appropriation - I see there are also references in the Bananaman strip to FOOM and ZOWEE BOWEE! Just joking! (he added in a frenzy of litigation - preventing notes).