I have found flights using Kayak and a search for business class travel.
The details for a straight forward Dublin - Orlando return are:-

Dublin - Orlando (Via Gatwick)
Orlando - Dublin (via Gatwick)

The thing is the legs from and to Dublin are quoted as Aer Lingus economy whilst the rest is VA business.
This being the case does that mean that on the return journey we would not be permitted to use the VA lounge in Gatwick since our onward flight is Economy class?