The streaming TV revolution continues on Windows Phone. Though, Channel 4 being commercial (rather than paid for with an annual license fee like the BBC and its iPlayer), there are ads to watch before programmes. The 4oD application itself is slick and comprehensive, with multiple ways to look up and access content. Note that it's only allowed to stream over Wi-fi though - partly to assure decent bandwidth and partly not to congest cellular networks.

From the 4oD app description in the Store:

4oD is free to download and hosts a wide selection of programmes from Channel 4, E4 and More4. Shows are available to watch free of charge, with no limit to the amount you can watch. Streaming is accessible via WiFi networks in UK and Ireland.

Features:
- Free to download 
- Wide selection of shows from Channel 4, E4 and More4 
- Huge 30-day catch up window 
- Some of the most memorable shows from the last 30 years
- Free and unlimited access to content
- Streaming accessible over WiFi

Here's a walkthrough of 4oD in action:

The main UI is unashamedly simple 'Metro', with the panorama showing recommendations, a drill-down 'Catch Up'....

...Categories and Collections. The latter, as shown, provide themed mini-channels that can be left 'on', perhaps while you're doing chores (e.g. cooking)

There's also an alphabetic index, good to see. The 'Catch Up' section is perhaps most useful of all, since the chances are that you already know that you 'missed something' and will know when it was shown originally.

Programme details, note that the panorama can be swiped to show previous programmes in the series (while they are available - typically up to 30 days from first transmission). There's also a handy 'Related' pane in case you fancy more programming in the same vein (e.g. comedy).

Between four and six thirty second adverts are compulsory watching before streaming of each programme starts....

The channel masthead appears...

With additional ten of fifteen second 'sponsored by' adverts on some (but not all) programmes...

Finally my programme starts!

A search facility works well to track anything else down - note that some programmes created by 4oD are available for longer, since the company owns the content. (right) No matches for 'Friends'? I thought this comedy was shown more or less every day on repeats? Maybe I'm a decade out of touch!!?

A very slick entrant in the streaming TV app genre and well done. There's no point in criticising all the ads, since they're what pays for the content, as they would on TV itself.

You can download 4oD for free here in the Windows Phone Store.