Mystery Red Frame, serial # 805400

Bought at swap meet a few years ago as pictured, and put aside until now. Seller claimed it is 531.
56 cm x 56 cm ctc
42 cm chain stay

Weight is 4.12 lbs

No Headbadge holes

Both seat stays have decal that says “Handbuilt in England”

Seat tube is 28.6 od
Top tube is 25.4 od
Down Tube is 28.6 od

BB is English thread, stamped BCM

126 rear spacing with Gipiemme drop outs with adjusters

3 top tube guides, 2 sets bottle bosses, no eyelets, down tube shifter bosses, pump peg

Brake bridge is recessed

27.0 seat post

Thanks for any help

More pictures here.

https://flic.kr/s/aHskYJWeVM

[IMG]IMG_0638 by lebagman, on Flickr[/IMG]

[IMG]IMG_0637 by lebagman, on Flickr[/IMG]