Fr @ Bhx
Thanks for posting those links.
The article about BHX mentions the (almost) doubling of passenger numbers from 900,000 last year to 1.6M this year.
With the summer schedule, FR are already operating an average of about 18 departures per day from BHX, which is more than sufficient for 1.6M pax without any additional aircraft, routes or frequencies.
However, you never know with FR - they could always decide to base more aircraft at Birmingham. Indeed, they will need to if they are to reach the target that they mentioned when the base was launched last year: 5M pax per year and 10 based aircraft by 2013.