(like this)
If so, I have bought a new 1 Litre tray for mine and annoyingly, it does not fit (!) so if it's any good to anyone, I'll happily send it on, rather than bin it.
The size is the same as my existing trays, but the size of the catch and holes aren't.
The approx size of the HOLE where the NEW tray clips on is 14mm x 26mm (whereas my old tray is 13mm x 24mm (and an "m" shape))
I would have returned it to Lewis' but I've gone and thrown away the packaging. Grrrr.