Drivers don't have right of way either. Both are expected to take care, and expect hazards[1][2]. In the case of a junction, where a car has turned onto a road a pedestrian is crossing, and at marked crossings the pedestrian does have right of way. There is no such thing as jaywalking in the UK.

If a car hits a pedestrian the starting presumption is a) driver is at fault and b) avoiding action should have been taken.

[1] Pedestrians - general: https://www.gov.uk/guidance/the-highway-code/rules-for-pedes...

[2] Drivers (Rule 146): https://www.gov.uk/guidance/the-highway-code/general-rules-t...

There are many other parts of the Highway Code that reference pedestrians, in multiple contexts. The general tone is "expect the unexpected and to find a pedestrian, or child chasing their football, everywhere except motorways and restricted carriageways (e.g. some dual carriageways)".

[3] Right of way crossing at junctions https://www.gov.uk/guidance/the-highway-code/using-the-road-...