You'll probably find it easier to get the tomme tippee first cup in the local supermarket or chemist e.g. Somerfield, Asda, Morrisons, Lloyds Pharmacy, etc, etc.
My dd also used this cup and then graduated onto the avent magic cup (or any other cup really!)
She is now mastering drinking from an open top cup - a lot more messy!!
Seona