for some reason my reply didnt show up yesterday..
Thanks for the replys, from what you've said then i assume that the KPN card wont be much use for data, that is e-mailing the odd photo+browsing etc

unless there is an add on that can be used with that sim to give me a reasonable amount of data.
The deal that i was looking for was the vodfafone 1GB smartphone blox which would have given me 1GB of data to use in a month.
So it looks like i need to get in touch with the seller of the KPN card (it did say vodafone prepaid when i bought it - but i received a KPN card instead )
an interim solution would eb a vodafone UK pay as you go card with data traveller ( £2.00 for 25mb per day) and then see if i can make it to a Dutch phone shop if needed, unless theres another solution??