hi guys i dont know if anyone has ever seen this site but you can put your old reg number in and make of you car and it will tell you if it is still on the road or not.
http://www.taxdisc.direct.gov.uk/EvlPor ... le+Enquiry
EDIT: LINK MIGHT NOT WORK, SO GO HERE: http://www.taxdisc.direct.gov.uk and click on "Vehicle Enquiry" on the left hand side