Shooting themselves in the foot
I don't see what all the fuss is over, I pay my TV license even though there's no aerial connected to my television, I only watch TV online because it's _more practical_ to do so (granted it's usually via iPlayer or the like).
I use TVCatchup rarely but I do need it, I'm a network administrator responsible for a series of web-servers for a few prime-time TV shows, when I'm in the datacenter monitoring servers late at night, there's no television in there to see whats going on, I'm wholly reliant on online services and this is where TVCatchup comes into its own.
The legal eagles are squabbling about whether TVCatchup is legal, it's only offering what is already made freely available (providing you have a TV license) to the public via an alternative medium. TV networks have to realise that people watching TV via an aerial is a 20th century concept and we're now in a digital age where broadband Internet is available practically anywhere, they need to adapt and serve this new age.
TVCatchup is helping them reach further audiences without it costing them a penny, they really shouldn't shoot themselves in the foot by trying to do away with it.