[ErroneousBosh]

> Worse is that the unlicenced spectrum that is available is often so heavily encumbered with restrictions in many parts of the world

It's one of the great things about the UK. As long as you're not causing interference to anyone that's actually paying for a licence, you can pretty much do what you like.

[inigyou]

Is it a practical thing as in they won't catch you, or does the law actually say that?

[ErroneousBosh]

It's not possible to investigate it, and there's no-one to report it to.

Ofcom have about two dozen engineers for the whole of the UK, none of whom are equipped to deal with it.

In general, though, in the UK if you're not making a nuisance of yourself the laws are pretty optional, and this is a pretty good example of it.