Over here the threshold is the sort that if you cross it you must become VAT registered.
Over here there is nothing preventing you from voluntarily registering if your annual turnover is 1p.
Over here there is no benefit to registering if you don't have to unless your customers are also registered and can claim back the VAT they pay you, in which case you will be at a price disadvantage competing with VAT registered businesses.
Given how the mechanics of how a Value Added Tax system works I struggle to understand why the same won't apply anywhere they have VAT.
