M62 Ambulance convey

Just seen a convey of Ambulance vehicles travelling east bound on M62 between Wakefield and Pontefract at 8:45. At the front a Discovery and L200, followed by what looked like some kind of command vehicle (about twice the size of regular Ambulance) and a regular Ambulance. Followed later by two Police Cars.

Looked like the response to a major incident but nothing on the News.

Anybody know what's up?

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Convoy(sic)