It's a nice looking Mk2 Driver, but that is definately not a Weber carb cos I had that exact same one on my old 1.8 GL.
Weber carbs look more like this :

And the engine he's claiming it's got is described on the TSR website as follows:
OULTON 8V 2.0ltr Non-Inj - 135bhp
We don't ignore carburettored engines, they are capable of respectable figures even when running a single carb. A fully balanced short engine fitted with a Pack A gas flowed head using a TSR 102 or 202 cam (depending on the head type) gives a very useful torque increase. We advise having a Weber replacement carb with this conversion (£220.00) to obtain the best results from the increased flow.
Fitted Price £2820 or DIY £2295
So as standard, this engine doesn't have a weber carb and the picture doesn't show one.
That's very pricey for a non-injection engine conversion and even so wouldn't make an H-reg driver worth that much more.