There is a studio fee plus the cost of each piece of pottery. 

Studio fee per person per day £5.00
This includes use of all reference material, stamps, stencils, brushes, colours, glazing and firing plus unlimited daily studio time.
 

Some examples of pottery prices are:
Tiles, egg cups from £2.50
Mugs, bowls from £5.00
Plaques, pet bowls from £8.00
Larger specialty pieces from £15.00