I�ve not seen any FTTRn going in recently. The picture in that other link just looks like a standard small Openreach cabinet to me, it really could be anything.
While that cabinet (in the other link) could indeed have been anything, the number (10) and the message written on top were a definite giveaway that it had something to do with the newly-created PCP (10).
https://postimg.org/image/902dd27nh/
The simultaneous improvement to the FTTC checker's speeds on offer to a dozen or so properties were just a bonus.
Note that it certainly wasn't recent, as it had the attendant publicity that went with the early trials. That unfortunately hasn't appeared to go anywhere.
But, by the same token, the new cabinet could still be anything...
When BT were trialling the very first nodes for G.Fast, then they appeared to deploy a set of FTTRN-style nodes for G.Fast, alongside a smaller number of power pillars (in the same style cabinet). Power was distributed over "spare" copper pairs to get to the new nodes.
However, that deployment style didn't make it past the bean-counters either.