Sometimes they weld those batteries to their connectors. If that's the case you have to use a bit of ingenuity to get them out. The weld is imposible to break so you can either cut the connector, or do as I do - grab a pair of pliers and carefully squeeze that CR2032 along the sides and you will see the battery pop apart into its relevant pieces. Now you can trim the "new" connectors made up of the old battery case to accomodate the new battery.
£11 is a bit steep for a CR2032.