Quite the contrary: in 2018 the majority of the Colas loco fleet including the 67s were sold to Beacon Rail and leased back (https://www.railforums.co.uk/threads/beacon-rail-buys-colas-rail-fleet.175393/). I can’t see Colas going too far out of their way to buy 43s outright.
Ah right - I didn't realise they'd agreed a sale and leaseback deal.