That looks like a Moulton Mini; too small for you. Minis had 14" wheels and were aimed at woman and children; being somewhat smaller than the 16" wheeled F-frame bikes. There aren't any high pressure/ quality 14" tyres available.
M Mini's had 5 1/2" crank length.
If its got 'Bradford on Avon' on the head badge, it ain't a Triang version.
I got 14" tyres quite easily. They pump up to 60 psi.
The seat post is quite long and a 5'9" bloke can ride it.
Some of the BoA models had a Sachs Torpedo coaster hub.
52 ring, 15 sprocket.
Middlemore matress saddle that's NOT comfortable.
NO reflectors in pedals.