Hi, could someone please advise on the location of the oil pressure switch/sensor on my Octavia 2003 please?

Not unless you tell us what engine the car has.

Apologies, 1.8 tdi, petrol

Not sure how much this helps, bear in mind that the engine is in the bay longitudinally in that Audi, rather than transverse, when you look for  yours.

 

On 27/08/2020 at 15:46, Aron said:

1.8 tdi, petrol

No it isn't. It's a 1.8t petrol, or a 1.9tdi diesel.