I have 80 odd hours PPL(H), so 10% is 8 Hours, and i might have 100 hours before I finish doing my PPL (A)
It actually says 10% of PIC time, so you may only be able to credit a few hours.
Basic Instrument Training Device" ( I presume this means a simulator)
It's referring to an FNPT2, which is a fixed base navigation trainer. A "simulator" would generally be full motion. These days, an FNPT2 is costing almost as much as flying an SEP aircraft. Maybe a saving of £20-£40 an hour.
As part of this training you would also have to complete the cross country qualifying flight, minimum of 150nm landing at 2 other airfields then returning to base and all completed in one day.