Subject to a Halstead annual service.....that they seem unable to give any details on cost

and they still haven't sent the memory stick or information pack.
Just the latest boiler marketing gimmick....if they wind up the cost to say a £300 annual service how many customers are likely to carry on the contract?....none, so the lifetime warranties void. Still there's enough mugs out there that believe 2, 3, 5 or 10 year warranties are always honoured.