Wowsers! What a find !  Is it a 3 SPD or 4 SPD, Sturmey hub, seems to me in pretty good nick and original condition, some use to have a cannister with batteries to supplement the lighting when at standstill ,it's very likely the rear bulb has failed, the Dyno was never it's strong point,I believe it was a 6volt rather than 12.
Tyres are modern , originals would either be White walls with black treads, or just black,so I would change for black,very unlikely to find new old stock now,or even appropriate ones.
But never the less a top of the range bike for the time I am jealous, ..,and you got it free!