CM:-
Patrol close enough to the countries the refugees come from and all HMS B needs to do is drop them back at home. When enough people pay $1000 dollars and then appear back on the dock looking jolly miffed, the rest will start to have second thoughts before buying their ticket.
Then home for tea and medals? I'll leave it to others better qualified than I to tell us what would be needed before HM warships could enter Libyan territorial waters, let alone enter its ports and hand over its 'passengers'.. to who exactly?
The country is in chaos and we all know why. The solution to that chaos and similar chaos in much of the rest of the African continent is, I would suggest, rather beyond the capabilities of HMS B or indeed the UK. Isn't there an international organisation charged with bringing peace to such war ridden areas? United what? Oh, it isn't? Oh well.