The picture below was provided with the below description also from 1966 ish
"The MG racing coloured ( cream & brown) ones were owned by Bob De Beer, & were ( if my memory is correct ??!!****) a K3 Magnette of racing fame, but I can't remember its history ( you might find it from it's reg' No.) & in the background the P type that still holds the Brooklands lap record."
The cream and brown car (number 58) is an NE Magnette (NA0519) and the single seat car is a Q type (QA0258). The cars belonged to the late Syd Beer and are still owned by his family.
Are you able, please, to mail me copies of these images for the register files please. I've never seen them before and think they are of value to the the register.
Tom, The 66 MG Silverstone meeting really is on a bit of a roll today; the Q Type (Malcolm) was entered as No 80 & Syd in the NE as No 58. Your friends memory was spot on rather than "ish".