[broadgage]

I too used to frequent the Tottenham Court road store.
I recall some rather nice circular fluorescent light fittings that they sold. Two lamps of different wattages, 32 watt and 40 watt, and in the middle a holder for a GLS lamp.
They also sold double insulated, flexible resistance wire which I suspect was intended for the manufacture of electric blankets.
And 200 volt GLS lamps, long after 240 volt supplies were almost universal.