I worked for Peter as a general dogsbody then instructor from 1977 until the end of 1979 when I went to do my commercial.
IIRC JM was the first of the 152's we got. Compared to the 150's (100hp Continentals) and the 150 Aerobats (130 hp Continental) (now that was a good a/c albeit without inverted oil and fuel) the 152 (110 hp Lycoming) was pretty gutless.
Kevin Wiggington is retired but still fying light a/c in the EDI area and Fiona is in Houston I think.