I went to B&Q get some today and was baffled by the choice of ratings and some of the horrendous prices.What appeared to be labelled as suited to a caravan / motorhome was some 'Arctic' stuff (blue cable) at £35

I'm running an external hookup socket with a standard 63A RCD master and 16 and 6a trips.
Will a length of normal external hookup cable (the orange stuff) do?