This little snippet gleaned from the minutes of the Devon & Cornwall Firearms Liasion Committee meeting earlier this year:
"h Solid Slug
The meeting was advised that DEFRA has stated that the
minimum calibre for Wild Boar .270 cal., but that they
have just advised that at CLOSE range solid slug can also
Question is, who will decide whether your shot was or wasn't at close range - the man from DEFRA with his tape measure, or the FEO using their tried and tested personal judgement? What is classified as 'close range' anyway? IMO unenforceable and uneccessary.