You have been here how long, and you are asking this question?
It all boils down to the UK Specials Program: DCVax has been available there for how many years? It is only logical that they would apply there first. NW and the MHRA have has many, many discussions about DCVax. They just dont approve a product for the Specials Program and forgot about it and just let the drug "run" with no updates or check-ins, analysis of patients treated, efficacy and related outcomes. We dont know the outcomes of such discusions but they has to be good if NW decided to submit the MAA. Guidance is always given by regulators in terms of the next steps. What did the MHRA tell NW? It is a easy question to answer.
But you knew all this before posting your stupid question and you are just trying to create doubt as too why NW chose the UK first. Like it was a bad move on Managements part. Hardly.