Hi ladies anyone know where i can purchase pretty bras in size 40 dd that don't cost the earth.online if poss?

Debenhams is a great place to try. I'm bigger than you, and I always get mine there (and you can even search them by size online). Look for their own brand Gorgeous, and the brand Fantasie - both of these are very comfy, and offer lots of nice styles. They are not "matronly" like Triumph.