Am stuck on 10 down: Martial arts standard British have to beat, 5,4.
Only have one letter so far.
??0??/????
Is the second word 'flag'
Does standard British stand for RP (received pronunciation)?
These are just wild guesses.
17 across is also a mystery. Works together, wrestling to pull in shed to the left. (7)
0?????S
Am assuming wrestling is SUMO
Grateful for help