Since you haven’t been there in 40 years, thought I’d let you know that the Hippodrome in Leicester Square is the coolest casino in London now. You don’t need to register to walk in, look around, buy souvenirs, or eat. They will only ask you for a players card if you attempt to buy chips. Also the most collector friendly casino there. The cashiers will look through their banks to find you anything and sell right from the cage.