Originally Posted by
stut
Hardly. The Whipps Cross convention - yes that one - of 1954 makes it quite clear that a pre-emptive cross-hatch manoeuvre such as that is barely tolerable. I think you should retreat to Totteridge & Whetstone to consider your options.
I think you're mistaken - the Lowry ruling of 1961 clearly indicates that there is small gap at Ongar that allows the reverse switch, without entering downloop upline. It is within the rules, though maybe unpalatable to a purist.