Help me identify this film please!

[Dogolphin]

Its driving me crackers! I was half listening to This Morning a couple of months ago talking about a new film and interviewing the actress who played the mother in the film. It sounded fun, lighthearted and amusing. I thought I heard them say it was called 'The Girl on the Train'. Obviously its not! Now I have seen the trailer its very very not! So, what was it?

Here are the few details I can remember:

Archaeologist and treasure hunter search for an artifact.
Mother involved in some amusing way.
British Museum was mentioned.
Something about a train (but that may be very wrong!)
I didn't recognise any of the actors.

Any ideas or do I need to email Phillip and Holly?

[SydneyCarton]

Is it Hooten and the Lady? Not a film, it's a new series on Sky. Jane Seymour plays the mum of the archaeologist ("the lady") and she (JS) gets kidnapped in one episode. She was on This Morning talking about it

[Dogolphin]

Yes! That looks like it. No wonder I couldn't find it I was looking for a film. Makes sense they would interview Jane Seymour as well. It looks fun.