Can you help to identify these frames, bikes or parts?

Trying to ID this 26er steel frame, found abandoned in Cornwallis Road N19 at the weekend. The front end MIA but I noticed the Surly dropouts out back and some interesting braze-ons, so wheeled it home. I’m guessing a Surly but not sure of the model: No serial number.
Paintwork looks like it was a decent gloss black all over but it has been ‘enhanced’ with gold lacquer at some point and the owner did a really REALLY bad job (including the back wheel) seemingly on purpose. Perhaps it was nicked? There’s ample patina from being stashed behind a shed for 15 years, and every open-ended tube had/has a spider lurking in it. YIKES.
As I say, 26er … canti/v-brake studs … Surly dropouts.

Any more photos?

http://sscycleworks.com/components/heads­ets-Campagnolo-parts.html

But you can have a new record headset at this price... (HS7-RE)
https://www.bike-discount.de/en/campagno­lo-record-1-headset

Thanks for the links - SSCycleworks is an amazing place and Michael is a total star. He's helped me out with a few obscure bits in the last year, but I'm sorted on the headset front now. Thanks you replying! Rob

The rim markings don’t look right, Shimano usually put the model on the rim ie C24, C35.
Hubs look like 7900 but black instead of silver- maybe Ultegra?

https://www.bikeradar.com/reviews/compon­ents/wheels/wheel-sets/shimano-dura-ace-­carbon-review/ (not much detail on model though)

Sorry - didn't update this. Tossed the frame as hairline cracks where the stays joined the seat tube and bottom bracket. RIP mystery frame.

Would have made a great ratbike! RIP!