Take into account the chemicals and initial cost of machine , £300+VAT is not expensive. Tonys extra tenner is for the tube fare.
Ditch the contract save your monthly ££'s, and you will be better off. As Dan intimated, parts are not available for the boiler so you are effectively covering the rad, pumps and controls (if specified).
Ditch the contract save your monthly ££'s, and you will be better off. As Dan intimated, parts are not available for the boiler so you are effectively covering the rad, pumps and controls (if specified).