If you have HA too, they support the regular Lutron Smart Bridge 2. You could use their Hue integration and bring the bulbs back to Hubitat with HADB for other automations if you want.
Yes, they definately are. There are wall plate brackets avaiable, but for Decora switch plates. Probably could find 3d printed mounts for UK wall plates. You would need special wall plates to use Picos in the UK anyway, since they are also sized for Decora style plates.
