The ability of a tied licensee to insist on MRO only kicks in at certain trigger points: lease renewals, rent reviews, changes of terms of changes of pub company. Let's look at each in turn.
Change of terms
Change of pubco
If I'm right, and change of pubco is the most important trigger, what does this mean in terms of the future of the tie? Practically, you can no longer buy leased pubs and be sure of retaining the income stream from the tie. When the purchase goes through the lessees are entitled to demand MRO. This completely changes the market, and will make financial modelling when disposals and acquisitions are made more difficult. It will inevitably make operating a pubco based on the tied model far less popular as time goes by. Better to simply forget about all that messing about with barrels of beer and charge top whack, free of tie rents, perhaps.
An ex-flatmate of mine is a Conservative MP. He was at the Finborough for our Birrificio Italiano event last Wednesday, a day after the vote in Parliament. I asked him how he'd voted. He'd intended to rebel against the government whip and support Greg Mulholland's amendment, but sadly his car broke down on the way to London!