The finishing touch for the interior of your boot is to replace the battery cover. Not only does it look neat and tidy, it also provides extra safety by protecting the battery terminals from shorts that could be created by loose metal objects - like your jack handle. Made to Rover specification, with three strengthening ribs along the top vs the flat top of the reproduction version. Ref: 5L877, 5L0877, YJM100020.
See also aftermarket version PT3010A for a less expensive alternative.