This is my first post and I found this strange, you add your item which should give you 199 points, but when you go to checkout it says:
>999 extra Clubcard Points with TomTom ONE GB + TomTom GO 510
and below that it says:
Sub total of items: £199.97*
Clubcard points earned 1596*
Very strange, I can't work it out!!
Anyway use TD-TDP2 voucher to double your points and bring it up to 1800, having looked at the vouchers agains you could also use TD-5PVN or TD-TD5P for an additional 500 points so up to 2096 points or £80 in vouchers available.