There are three ways of receiving Portuguese language TV in the UK. One option is to have a Portuguese satellite dish (TV Cabo) installed which comes with a monthly subscription (similar to Sky). for more information about this, click here
There is another (free) alternative if you already have Sky satellite television. [With or without a subscription] A Brazilian channel called Record Internacional which carries news (noticias) as well as soap operas and sport. The channel is from Brazil but is still of interest to the Portuguese in the UK and people interested in learning the Portuguese language. This is available on Channel 810. You can see their website below. Also, you can change the language of news channel "Euro News" on channel 528 to Portuguese if you set your favourite language in the menu to Portuguese.
Or you can try the website below which allow access to RTP Internacional (A European Portuguese channel) online for a fee.