Anyone recognise this?

[HFStuart]

Popped up on a FB group and I've reposted it to another. I don't recall seeing it about but my memory is terrible

[Nigel]

Hi Stuart,

I think I see an aftermarket tank there, aluminium by the look of it.

As I said on FB I saw this car in Sterling on 23 Sept 2019. I recall it being a good
rust free example but he was asking more than I wanted to pay at the time.
This turned out to be only a few weeks from finding my HPE, which is what
I really wanted anyway.

I have seen it since on the internet, perhaps a sales ad for when it changed hands.

Nigel