From what seems to be said, UK customs are notorious for seizing such packages. Not that many people from the UK complain, but it looks like that's where the most residents whose package was seized come from, country-wise.
I've heard from others in Austria, Australia, I mean everything starting with A apparently, and including the US having tight customs. Customs must be run by jews now.
As far as is reported, in case of a seizure, you only get a seizure letter and/or a warning, but the gov.uk would have more info under "international trade" or whatever.
I would say try it, if it goes, it goes.