Valve springs
 

Sticking some newman ph3s in my VTR and I have read online I will need some uprated valve springs.
Where can I get these from? Are there any cheaper than the £50 mark?

Single cam unless you are running 16v - there's about £150 saved already ;)

Anyway - no you don't need updated valve springs with a ph3 cam. You generally need uprated springs when you're revving much higher than standard to help reduce valve float. Unless you're raising the limiter to silly rpm don't worry about it.