First you must remove the four circlips holding in the four plastic locking pegs. Pliers, as little bending as you can get away with, and waggling are your friend, you'll need to reuse them.

There are now four hollow through rivets that need to be dealt with. If you're lucky you can crunch the back side of these with pliers without having to tear off the padding foam around. If it's a struggle, remove the foam around, slide a spudger or razorblade underneath one side and you should be able to lift enough to squash them.

Remove the foam very gently, starting at one of the ends and working your way along the rim. It's not the end of the world if it tears but it's best if you can get it off in one piece without stretching and tearing it. You can try warming it a little with a gentle heat from a hairdryer if it's being stubborn but it should come off fairly easily.

Place foam to one side, it should be reusable without any extra adhesive.

With the rivets removed you should be able to slide a spudger into the rim of the lid and work it under and pop it off. There's no catches, just a uniform lip all around underneath. Be careful removing it because of the charging cable.