Thanks guys , this is what happened- tried local locksmith no joy -then local land rover dealer - can make copy from key but no spare but could supply key number from vin assuming locks never changed.
Called bigger dealer hunters in chester with key number- they checked key number/vin too- who on e-mailed pic of v5 and readable vin made made a new "blade" and offered to post it for £10.50 +vat.Replacement key (blade) fitted fine , phew.
Many thanks Hunters Chester.10/10 service on 13 year old disco 2.
Pete