On the Blackwall Tunnel approach the flags were static, as if frozen.

There was a slight air movement on the heath, even at 'c1 degrees Celcius below' hard to discern but at least it was mostly consistent. Although the bright sun did have a warming effect prior to high cloud filtering the effect there was little or no rising thermal circulation.

I guessed that the air movement was between 1 and 2 miles per hour... Who knows? Anyway the Zens with Race frames and 3 wrap centre worked fine and a Rev 1 with Zen spars seemed to cope as well.

We flew some silent leading, as in 'no calls' just fly and pick up the intention to slow into 'Mercedes turns' or simultaneous 'ladder ups'. (There was a bit of treacle flying as well.)

The transition into the 'block' equivalent is potentially very interesting.

Felix