Discovered a major leak and blockage under the kitchen sink on a Sunday night.
Sent an email to All Hours Plumbing asking if they could could come and service it the next morning (i.e. Monday morning). Received a call at 8:00am on Monday morning saying they could come within 30 mins if that suited me. Said yes and they came and fixed the whole problem (including clearing another blockage at the outside sump) within 40 mins.
Very happy with the service and quick response.