We were on the waiting list with both Meaco and John Lewis.
Came back into stock twice at each place and both times we were too late-sold out in hours.
But Argos also stock it, and they don't do a waiting list, so the second time the other shops had sold out, we tried Argos, got what we wanted, and it was delivered within a day or so.
So I recommend going on the waiting list with John Lewis, then when the stock gets moving, promptly buy it at Argos!
PS very pleased with it - Meaco Arete One 25l