yeah think his right there, I may be wrong, think min is a .270, but think a .22/2, is ok in Scotland.. (for some reason.. don't know where I got that but think its right, lol), but I think it has to loaded in a certain way, again I may be wrong, or the law may have changed since i used to shoot.. think its from the Deer act of 1963 ish......???
.243 is the minimum deer hunting calibre in the rest of the UK, and .222 in Scotland.