http://http://www.bbc.co.uk/news/uk-...nwall-29783162
According to the above, 4 years.
To continue the speculation from CS, there appears to be a 1hr "gap" between the BHX flight arriving in NQY and the MAN flight departing according to the times published so far.....this suggests to me that the BHX and MAN flights won't be operated by the same a/c.
Currently the "based" aircraft operates the 3 LGW and 1 MAN trip scheduled for the winter.
We shall see.