Apparently it was the syncho-pair, according to the concurrent thread on R&N.
I think there may be some repercussions from this in the medium term. Given the swingeing cuts that the RN and Army are accepting in their
PR budgets I can't see them offering much morale support to the RAF's decision to send a C-130 and ten Hawks to Greece, then accidentally damaging/destroying two £5m aircraft by deliberately flying them headlong at each other...