Radiator Repair

The Boiler Doctor, gave us an appointment, just a few days from our request- it was not  an emergency .  He came on time, and very quickly fixed the problematic cold radiator.  It was something we had tried various things but could not resolve.  He kindly explained what the issue was, and how we could sort it out if it happened again.
What can I say, quick to respond, efficient, effective and very polite.
I know who I'll be calling when the heating plays up again.