Southend - well I call a 10 minute walk to pay for fuel and landing pretty inefficient. And the wait for the bowser can make you chew your fingers.
Gloucester - excellent. The ground guys (firemen) are excellent at fuelling and handling.
Sheffield - really impressive, but that could be because they have little traffic. Free landing with minimum 50 litre uplift. And probably the smartest caff north of Kemble. (Ah - now there's an inefficient heli field. Land for Avgas at pumps, which are laid out for fixed wing, then lift and park at tower to pay. Madness.)
What we need are more airfields to realise that helis are really handy profit centres. We don't need acres of space, we don't punish your tarmac, we love doing our own refuelling - and we love food!