wheres ya key set with plastic emergency key and valet key etc???
if you go to your main dealer they will get you a key to open the boot for around 40 quid...
there is also another frig where you can temporarily power the electronic boot release mechanism or summat in the boot handle with a 12v battery IIRC, not done it or tried myself like tho...
the RAC/AA etc know how to get in em its bin mentioned on here before...