Hi Poppy. go to http://shop.ezee-fix.co.uk/index.html  or try http://www.4directelectricals.co.uk. do a search for a door catch or a door interlock  V. cheap part, should be easy to replace.
WASHING MACHINE SERVICE AND REPAIR MANUAL.
cut and paste the following address into your browser for more info. www.2ndwave.co.uk/manual.html
                
 dan
                
 February 2008