There is no need to remove the plastic boot trim in either version (I've got two of the early, and one later version and have replaced battery in all three and added a spare tyre carrier to one). The toolkit blocks were designed by someone who had a great love of and respect for Tetris (or complicated veterinary obstetrics!). In my experience if you *need* to remove the long foam block (earlier A2s had the two lower battery-retainer bolts visible there obscured by the foam block), you need to firstly remove the other tool-carrier foam modules to the right of the battery (jack first, then the other tool carrier). The long foam block that abuts in front of the battery can then be corkscrewed outwards and upwards and to the right into the space vacated by the other blocks - it is actually perfectly shaped with rounded lower corners and just enough compressibility to enable this, thereby revealing the two bolts securing the battery-securing plastic barrier. Feeding it back in is the same operation in reverse - you put the end in with the block rotated, then effectively rotate and push the block into its final location, moving and twisting simultaneously. I seem to remember needing to give it a whack to get it to go the final inch, but it does so, 'clicking' into place. Then the other blocks go back in.