I'm a teacher, but I'm not in the UK. The main focus for teacher gifts where I am is "Teacher's Day", which was last week rather than end of term.
I got a number of wrapped gifts, which in all honesty will get re-gifted, but what I will absolutely treasure is the handwritten notes from the students (I teach ESL so the English isn't great but I love that they try!)
My favourite this year was from one of my Y8s, who I have had since she was Y7, when she arrived at our school with virtually no English at all.
"Dear Miss Fatowl, thank you for teaching me the English and I sori our class is too noise".
And one from my (very honest) Y5s Thanks for teaching us English but the book we read this term was a bit boring"
But I got a better review from Y4
"Thank you for reading Charlie and the Chocolate factory with us and bringing real chocolate. I think we should eat more chocolate in school"
Sorry...off the point a bit, but handwritten notes are what we genuinely treasure.
And wine.