That looks a good price.
I use these:
Shampoo - £12.99

NXT Car Wash
Advanced formulation and an exciting new look – a killer combo! Our expertise in Engineered Synthetic Polymers (ESP) has provided us with the technology to create a completely synthetic car wash concentrate that loosens and emulsifies even the toughest dirt and road grime while synthetic lubricating oils glide them off of the surface without marring the finish. Engineered water softeners help reduce deposits in hard water, leaving behind a spot-free finish.
Step 1 - Deep Crystal Paint Cleaner - £7.99

Step 2 - Deep Crystal Polish - £7.99

Step 3 - Deep Crystal Carnauba Wax - £7.99

All applied with these (seperate one for each product):

And buffed off with this:
