If PK wishes to be a smart cookie he should ramp up charges for Ryanair, get rid of them and then declare the airport a Ryanair-free zone forever
This has possibly already happened which could go some of the way to explain the total stagnation of the FR base at BHX: other airports must give them a far longer reduced fee period or charge nothing at all to make some of the marginal routes that FR do from other airports viable, i'm thinking for example of the almost wholly leisure and/or VFR routes like LBA-RIX, EMA-SVQ and so on. Either that or folk using BHX have no further desire than to either chase the summer sun or collect air miles with the Star Alliance.
As for becoming an FR free zone, despite the fact that IMO FR have done virtually nothing for the route map from BHX, despite their stagnation, they would leave a big hole with no one to fill it, which is a pretty dire position for BHX to be in
More positively, there is a rumour that Mahan will restart in Sept, twice weekly to/from Tehran, although I have a horrible feeling this rumour has more than a sniff of eau d'Armavia about it - lets hope its good news