We went to Truro Museum, where my sister remembered having seen some L't china. Indeed there was, a mug inscribed 'A Trifle from L***t' (this was in a section about seaside holidays and memorabilia, pointing out that souvenir ware was already being made in the 18th Century) and, in their section about china through the centuries - for china clay comes from Cornwall (not the L't china clay, however), several more pieces. A couple of the photos aren't good enough to post, but here are a couple of pieces.
No. 45 is the Imari pattern. No. 46 is wrongly labelled, it's not L't.
I wonder if they know quite how much the 'Maria Hoyle' teapot is worth, assuming it's not badly damaged at the back, where it's inscribed Norwich. It's an unusual pattern and anything with a name on is worth a lot. Eight or ten thousand pounds at auction, I'd think. More if it's perfect.
Random strutting seagull