Looks like wrx that has had some badges and a vin plate thrown at it.
The VIN is a UK vin number, applied model code does indeed come back as a wrx sti prodrive uk, however i suspect its a ringer.
The parts i notice that look wrong,
running gear (rear diff is a R160 but should be R180) (2001 wont have DCCD even if it was an sti)
gear stick should be lift reverse type, this one isnt so its a 5 speed box
engine, no red inlet, missing alternator cover + various other covers and such
interior, seats, (carpet was grey for the sti model so is correct)
dash (dials should be blue, no intercooler spray buttons)
fog lights
brakes
Wheels
rear spoiler is STI replica (light should be at bottom for that year and angle is wrong)
WRX headlights
rear lights are from a later model
one side of the front wing has a reflector, other carbon insert, should be carbon both sides
The longer i look more i find, underside looks rather ropey, and for an sti its missing a digit in the price (Although not in the best condition).
Short version, walk away.
Just for ref, a genuine sti for sale
https://www.autotrader.co.uk/car-details/202407302305530?sort=relevance&advertising-location=at_cars&make=Subaru&min-engine-power=250&model=Impreza&postcode=DE5 9TU&year-from=2001&year-to=2002&fromsra