What the "S" is going on at LHR?

[GTH]

There is more information on this subject at
http://www.pprune.org/forums/showthr...threadid=51765

As you can see we have been trying to get the word out for quite a while. For most airlines all that was required was to keep the transponder in the normal position until on stand. The squat switch prevents problems with other radars.