No set date I’m afraid. Originaly Virgin was going to lease an Etihad A340 to cover some routes from LGW whilst each plane is down for the refit. However this has unfortunately fallen through, and I believe the normal winter re-hash of flights is being looked into to cover one aircraft being down. Virgin well knows that the LGW fleet is tired, and the business routes get the refit priority over the bucket and spade planes. The repaints take something like 3 weeks at the mo whereas a full refit is more like 6-8 weeks plus problems – something difficult to work into the schedule.
I’m sure when the decision is made and communicated to the relevant company employees it will end up on the internet quick enough!
FB