Wow. Thank you so much for this Paul. I really appreciate the help.
The image on the registration document definitely fits the shape, of the sweet/dish and the handle.
The only character that matches the lozenge on the dish would be the D at the base for September. I really cannot see the year as a J at all. Not even if I squint at it.
The lozenge on mine looks like -
1 at the top (which is centred so it doesn't feel as though there is other number either side)
F or E at the right (there's a definite straight down stroke, with straight upper line and shorter straight middle line, but they fade out)
Bottom looks like a partial D (straight down stroke and slight curve visible)
and a U on the left for parcel number
I think it's a safe assumption that if there is a U in the parcel number position then there may be errors elsewhere.