Dear Rob,
I know it´s ages since I last got in touch, but I wanted to let you know that I´m hoping to spend a few days in Birmingham in two weeks´ time – actually just before your birthday. I thought we could get together and go out for a meal. And if it´s OK with you, perhaps Mark could join us as well.
Anyway, it would be great to see you. If you haven´t got my mobile number, it´s 07732 268024.
Best wishes,
Sean