28 across: abbreviation of the former name of the government regulatory body supervising the gas and electricity market in the UK (1,1,1,1,1) O-F-M? Thought it was OFGEM or OFCOM but 29 down is...
Three silly little ones! 13 across: not so out of order after tool's taken out (4) less? 25 across: Arsenal's back four's rejigged without success (4) -e-n? 26 down: large number greatly impressed (4)...