We have contingency plans, but can only act in accordance with guidelines. We review firstly government advice, then Sport England, British Cycling, and Cycling UK (CTC).
In the longer term there are likely to be issues specific to long-distance events which will need addressing.
So now the guidelines in England have been substantively eased with effect from 4 July, Ian, I hope Audax UK will have the boldness to 'act in accordance with guidelines' (ie amend its decision by bringing the resumption date forwards and instigate the contingency plans to which you refer) since the advice has changed? Sport England, British Cycling, and Cycling UK (CTC) will be acting on the revisions and reinvigorating cycling fairly promptly (I guess) ie well before 1 Aug with organised group rides and the like (on 4 July?).
British Cycling have stated their caveated intent to resume regional racing and sportives on 1 Aug. Audax UK have currently agreed to let individuals, pairs and small groups ((<=6?) to ride permanents and the DIYs. Isn't that a mismatch?
I can understand the wish to stay in echelon, but the cross wind is blowing and the leading element of the peloton is about to go up the road: it's worth being near the front.