Thanks everyone!!
So many suggestions!
I’d love to try them all to find the perfect one. I bought a Maybelline one last week, which has been recommended on other sites and was more of a cream than a liquid.
However, my skin feels tight and dry and I think that’s my problem.
My hair has become very dry recently, and despite using a decent moisturiser, I am really struggling with my skin too.
I actually don’t wear a lot of make up and was wanting the foundation for DD’s wedding in a few weeks.
So, after weighing up all the options, I think I might settle for a tinted moisturiser.
Thanks for all the suggestions for online purchases but I struggle with colour matching when I have the products in front of me, so there’s no hope of getting the right colour online!
And regarding asking make up counter assistants - I am yet to find one that seems truely interested/knowledgeable! 
I’ll set out on my quest for tinted moisturisers now...... fingers crossed 