Just bear in mind that for commercial use you need a license from the CAA and they are beginning to crack down on unlicensed use.
Note also, strictly speaking, a lot of FPV flying is illegal as hobby quads have to kept in unaided sight.
The CAA rules are here: https://www.caa.co.uk/default.aspx?catid=1995
They are pretty understandable and for once pretty much common sense. Note a 2kg plus quad dropping out of the sky will hurt if it hits someone so not allowing FPV flying for eg or ‘out of sight’ gps guided flights is pretty sensible.
I have been following the CAA’s stance on this for a while (I fly RC choppers as well) and it seems they are happy to keep regulations to a minimum for hobbyists so long as people are sensible. If accidents start happening, property starts getting damaged etc they will start to clamp down.