Raleigh Mustang, got it!

17°C, band of rain cleared to sun.
At last, I have it. I’ve brought it up north to ride and make fine adjustments. The bars were too high and the front brake rubbed.​

Here it is today with mudguards and the rack. I’ve lowered the bars and the handling is good.
Looking over it, you could summarise it as a top-quality frame with room to upgrade components. Most conspicuously, the wheels are heavy and the chainset is rather basic. Delivered, it has 175mm cranks and even with mud-guards, there is room for longer cranks. Remember, I use 180mm cranks on the older bikes. SRAM do such a crank-set which includes an external bearing bottom bracket.
While in the shop, I picked up a speedo. They pulled out a gps cycle computer from the back. I have posted about it separately.