I can't see why BA would waste slots at LGW on a domestic route, putting themselves up indirectly against EZY who are dominant and EI who apart from a brief period have only ever been 3x daily, both of which would be cheaper for point to point fares, therefore leaving business pax and connecting pax to chase. In order to seriously chase business customers you need high frequency, granted it could work in tandem with LHR and I'm not sure what level of connection passengers they would achieve with limited frequency and competing against their own high frequency LHR route.