Complex sentence: He then returned to Birmingham to present at BRMB again until June 2004 when he went back to London to host the overnight show on Capital 95.8 during the week, a position he held until May 2007.
Split into simpler sentences: He then returned to Birmingham until June 2004 to present at BRMB again. It was in June when Tim went back to London to host the overnight show on Capital 95.8 during the week, a position he held until May 2007.