Shouldn't be a problem justifying continuing to BHX. My past experience of these kind of scenarios is that the CAA are looking for safety orientated decision making. Any mention of commercially driven decisions such as continuing to a maintenance base would be far more likely to attract scrutiny. Yet, I do hear pilots briefing that they will continue or divert to the maintenance base in the event of problems.
As for dispatcher Dan, hope he's enjoying his 15 minutes of infamy.