SilsoeSid: Look
now at
RadarVirtuel.com with a Volcano Ashes Layer (courtesy MightGem)...
.... Willy Walsh must have forced this by having his planes hold (look at the spectacular holds of the inbound BA aircraft) and I guess they're playing tough with him to not let them in....... waiting till their low fuel forces a bigger divert... hence not:"with imediate effect"
Watch it live!
Well done CAA getting the SVFR going - some common sense