If you add all the power consumptions together, it will still be under the 3KW max you can reasonably draw from a 13A socket. The main reason people use a minimum of a 2.2KW spindle is because it takes ER20 collets which allow you to use up to 1/2" shank cutters. I doubt if there are many home-built machines that are strong enough to load these spindles to max power, so in practice you will be drawing much less and you will be even further under the max permissible for a 13A socket. Consider plugging the VFD into one socket and the rest of the electrics into another. Each will be way under max load, and behind the covers a normal UK ring circuit feeding them will be fused (MCB'ed?) at 30A which is plenty.