In punishment for pointing out my terrible spelling, I shall subject you to a lecture on the usage of the various terms.
Britain = England, Wales and Scotland (I.e. The geographically distinct main Island).
Great Britain includes the above and all non self-governing islands. (e.g. Hebrides, Orkney etc).
The United Kingdom includes all of the above and Northern Island.
The British Isles means the combination of all of the above and also the Republic of Ireland.
Confusingly, the British Islands means the UK and The channel Islands and the Isle of Man but not the Republic of Ireland.
Bet you are all glad you didn't have to learn Geography in the UK eh?
Also strictly speaking my comment above referred to the legal system of England and Wales, not Scotland or NI, which have their own distinct legal systems.
Finally if you were wondering what kind of slightly anal-retentive person would actually know these things as opposed to simply using them interchangeably like everyone else; then I can only tell you that my knowledge is vast
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The physics is theoretical, but the fun is real. - Sheldon Cooper