Just seen the 2004 British Superbike race calender in MCN and its good to see there will be no date clash with next yeats TT. The Mondello Park Irish round is on May 23, and there is a gap then through to Brands Hatch on June 20.
The TT is May 29 - June 11 so there is plenty of room for teams / riders to fit the 2 weeks in.