Our office building in Old Street has this shield outside.
It's even better inside. The words say 'More Light, More Power' which is a good phrase for many things. I'd always assumed it was a strapline for an old power station.
Here's another one on a gate near a church.
Here's another on the top of Shoreditch Town Hall. Turns out it was the motto for the borough of Shoreditch to celebrate the provision of electric power around 1900.
Made me wonder what the motto is now. It's 'Justice is our tower'. I dunno maybe that's something about luxury apartments.
Every London borough has a motto obvs. Redbridge's is 'In Unity Progress' while Ealing's is 'Progress With Unity'.
Islington's is 'We serve' which maybe they nicked from Wandsworth whose motto is 'We serve'. Or vice versa. IDK.