The CAA have missed the mast at Stokenchurch off the latest 1:500000 Chart published on the 15th April. This mast is situated approx 6.5 nm NE of RAF Benson and is on the ridge just above a strip called Lewknor, which
IS marked.
The mast is situated 2 nm due East of Lewknor and has a height amsl of 1141 ft. If you look at the new chart, the spot height marked on the M40 motorway of 837 is right beside the mast.
APPROX repeat APPROX co-ordinates are N51.39.7 W000.55.3
Check your old charts and be aware that this mast is there, and don't go haring around there in the grotty weather which can be prevalent in this area due to the ridge, without being aware.
I guess the CAA will Notam this in due course, but if I were you I would mark the spot in indelible ink.!!