Seasons 2-4 on DVD?

I've heard rumours seasons 2-4 will be released on DVD in the UK in the
near future. Can anyone confirm or deny? I have season 1 on DVD and really
enjoy it, but you can only watch the same old episodes over and over again...
Besides 'The Rack' from Season 2 is one of my favourite episodes and I would love to own it on DVD.