If you don't have a spare key, then you are going to have to pay someone to break into it without doing any damage.
You may be able to contact the dealer with you VIN# and proof of ownership and they may be able to cut a new key.

Thank you for your reply it appears that it maybe that a small spring has broken but we need to remove the door card to effect a repair and that looks like it may be quite a problem, Once again many thanks for you observation Mainspring.