Overall, the technician did nothing wrong. My underfloor heating pumps were seized, I tried turning them manually and I couldn't get them going, so I called for professionals. The technician turned up, tried turning then manually and couldn't get them going. He didn't think it was worth investigating further and concluded new pumps were required. £129 for a 20 minute visit. Why not offer a flat fee call out charge refunded against future work? Or at least only charge for 30 minutes? At those rates, I would suggest trying every possible alternative before calling someone out.