OP
Darkwood
you can also put a 5amp socket outlet on round pin and change the plug too or T pin socket have it marked up as it will avoid nuisance tripping when joiner cant plug his 110v tranny in next time hes up there, i agree a 13amp outlet shouldn't be fitted to a 5amp circuit when there are plenty of alternatives, lofts are usually dark and dingy so simply marking up 13amp outlet for aerial booster isnt good enough as ive seen loads of trades men ignore these over the years and use them for all sorts.