Just south of Leominster station today were 4 On-Line On-Track Drainage RRVs: R29VAC, W30VAC, W30JET and another which on both passes I read as K2JET but I can't find this one on the site. Any ideas, please?

A lorry or van type. It was difficult enough to read the registration plates as all were near each other and the train was moving so I couldn't get the POV numbers at the same time.

I dictated the sightings into my phone and it is quite possible I misread something.