A Lofty Perch Traditional Cache

On most days, aircraft approach to land at the Imperial War Museum in front of this cache.  When the wind is from the east, you will probably see them taking off from right to left.

On airshow days, expect to find a lot of muggles sitting around, so this cache may be hard to access.

You're looking for a black magentic nano-cache.

Note: Following a number of logs mentioning the difficulty of crossing the road (the busiest local authority-maintained in England, apparently), I recommend taking the small entrance approx 400m to the east of the cache (at 51.102692N 0.105963, for those who navigate purely by latitude & longitude...) where there is safe and convenient parking, albeit at the cost of a return walk of half a mile. To return to the M11, drive along theis residential road and make two right turns.