Regardless of its location, the DVLA is a Government service, and as such operates on posh people's hours.
Try going to your local office for a couple of hours of entertainment, it's not entertaining if you wish to use their service, but it is if you don't.
e.g. last time I was there, changing my Father's tax status from Disabled Does Not Pay (in lieu of a motorbility Kia) to Does Pay As It's A New Tax Year And Your Form Hasn't Arrived (see a common thread)*, there were dozens of people who wished to either tax a vehicle or register it in their name.
Why not do it online you ask? Me too, as either it wasn't their car, it wasn't insured, not owned by them, doing it on belhalf of their Mother's new boyfriend's Sister's other half, and so on. Not I'm not so sure that it's the DVLA's fault things take so long.
*You can change from pay to not pay, and collect a refund online, but to do it the other way requires a trip to the local office or send off your forms and certificates to Morriston. Oddly enough the correct form was waiting for us when we returned home, but being a stickler he didn't want his car untaxed for the few days it would have taken the form to arrive. So first of the month the rigmarole was undertaken.
And like Wezley the month's taxed he paid, and shouldn't have, was removed from his refund which arrived a week later.
...if wishes were fishes, we'd all cast nets...