it's a bit of a story but MrsTT initially banned me from taking bouldering mats - but I managed to negotiate taking my smallest (1 by 1m snap pad).
There's that 7a arête on the McHaffie's Crack boulder.
what you need is some strong and stable leadership
Theirs loads of stuff in the grade range you're looking for by mchaffies crack. Also some stuff in middle near hi karate . Get the PDF and have a look , absolutely loads to go at