As of the 5th of October, FTSE 100 has been updated to UK_100.

The UK 100 (FTSE 100) is the main UK index. It is a collection of 100 of the largest publicly traded UK companies. Clients can get up to 100:1 (for professional traders and non-EU) leverage on the UK 100 (FTSE 100) (the Leverage for EU retail clients is 20:1).