I got the information from the Air Britain archive which I assume to be correct, though you never know. I have found various references to Air Taxis Ltd in 1934 and they all refer to Captain Crundall as being their pilot on various escapades. No other names have been mentioned.
I believe in 1934 they only had the one Airspeed Courier, the other one they operated G-ACLT is only shown as being delivered to them in 1939 and sold shortly afterwards when war broke out. I wonder how many pilots they employed.
It would be interesting to know if this chap is Edward Duncan Crundall DFC, AFC, the WW1 ace who had a career in civil aviation between the wars. There was also another pilot Eric Randolph Crundall but I doubt it was him.
Regards
Rob