For the UK, the EASA PPL requirement for SEP(A) are listed here
If you don’t already hold a licence, you will need to complete 45
hours of flight instruction on aeroplanes, 5 hours of which may have
been completed in an approved flight simulator (an FSTD – flight
simulation training device), including at least:
- 25 hours of dual flight instruction,
- 10 hours of supervised solo flight time, including at least 5 hours of solo cross country flight time with at least 1 cross country flight of at least 270 km (150 NM) that includes full stop landings at 2 aerodromes different from the departure aerodrome.
You will need to complete a skill test after you have completed all
the flying requirements.
You will also need to ensure that the examiner meets the requirements
for test notification and designation as set out in:
IN 2014/110 (for UK examiners)
IN 2015/050 (for non-UK examiners)
The list on the left of that page also lists requirements for other EASA licence types.
Non-EASA aricraft can be flown under an NPPL in the UK. An outline of the NPPL is listed here