Really depends on what you want them for milk meat or wool. Boers or x for meat , Angora for wool , Then you have all the milking breeds Saanens/British Saanens (bigger then the pure bred cousins ) Toggenburg/British Toggenburg , Anglo Nubians (Jersey/Guernseys of the goat world), British Alpine , Golden/English Guernsey, and English and pygmy. All have there own speacial traits lots of info on there breed websites and the British Goat Society website .
With goats you have to remember they are not natural grazers they are more browsers so love to be in hedges, i would always advise a strand of electric fence around your fields once they get use to it can b switched off more than often.They also need shelter as there not keen on the rain .Well mine never were .
I no longer keep goats but bred and exhibited them in the 80s.90s and early 2000, iam in Devon if you need any advise .
Martin