Harding UK John Gladys Carol and Cathy

Im looking for any relatives to these people.
They are my husbands cousins and uncle.
John was born in 1918 in Dublin, and emigrated to UK. Unsure if Gladys is Irish or British.

As far as we know they lived in Newmarket.
If anyone knows anyone in connection with these names, please get in touch, as I have hit the proverbial brick wall!!!!!!