I'd give them 0 stars if I could. Had the annual service (inc radiators) in June. All fine. Two months later have a problem with the boiler not firing. (OK these things happen). Guy came to fix it, identified gas valve needed replacing, but couldn't do it as he didn't have the right part. Suggested we might also consider a power flush. No-one returns and one month later boiler stops altogether. Orwellian nightmare begins. I ring up and they say there is sludge in the system so won't come out to fix the boiler until it is 'power flushed' (although there is nothing in the terms and conditions that stipulates this). I call another engineer out to come and do the power flush. His comments were (i) power flushes should be done hot so need boiler working and (ii) sludge has nothing to do with the gas valve problem (iii) how come they didn't pick up sludge at annual service. SP just keep parroting that power flush needs to be done even when they know it should be done hot. Looks like at least 6-8 days we'll be without water and heating. Utterly, utterly useless. Avoid