1st class recorded for a frame? no chance, 1st class recorded is for packages or pacels, its not for huge frame boxes…..regardless of what you think, im sure this is why your frame has not reached its destination…
go onto postoffice/royal mail and do a quote, at no point does a frame get offered the recorded delivery option, any frame unless its a tiny kids bike is not suitable for 1st class recorded, im not sure who has told you this info? but ive tried to send things like forks and things of that size to be told recorded 1st class isnt an option due to the size of a fork box, jeez how much bigger is a frame box than a fork box?
plus you know the max you can claim is 42quid right? so either its a crap frame, or you are going to be seriously out of pocket…
i imagine it is stuck somewhere in the network, due to the wrong pricing/delivery option, probably not to be seen again and chucked to one side 🙁
scrimping on the postage could well have screwed you here