Beckmeter was built in England NB and Power bought a lot of them they went in with Bennet pumps and became the Bennet Beck.
Gilbarco was owned by Esso/Exon until they were sold off to GEC in 1984 hence all company owned Esso sites had Gilbarco pumps so did Cleveland until they went in with Esso in 1967.
Wayne pumps were taken over by Dresser and became the Dresser Wayne who took Ferranti pumps over in 1990 and supply most of the supermarket pumps in the UK although a Portuguese firm called Petrotec is making its way in the market.But the three big manufacturers today are Gilbarco Tokheim and Dresser Wayne .Like cars many pump makers are gone , in the 1960/70 Veeder Root made all the mechanical computers for all makes of pumps but with the arrival of electronics all this changed reliability improved super markets started selling fuel and the rest is history. I am amazed that people are buying hand pumps thinking they came off forecourts but in fact they were built for farms etc and some are not as old as one would imagine . I personally had 44 years in the pump service industry when I started I had hand pumps on retail and when I finished I had the latest with multi grades and electronic calibration thats progress.