In article ,
neil leslie writes:
Last year we had the kitchen floor tiled. A couple of the tiles, just at
the door as you go in, are coming loose. I'm sure this must be easy to
fix but I'm unsure how to start. Any help/advice appreciated.

Well, there's possibly a fundamental reason they came loose.
What's the underlying floor structure?
Has that area got excessively wet?

--
Andrew Gabriel