Television Advertising

How much time do broadcasters get for advertising. Don't PSB' and Digital channels get different amounts?

A quick Wikipedia search would have told you

On the commercial channels, the amount of airtime allowed by the UK broadcasting regulator Ofcom for advertising is an overall average of 7 minutes per hour, with limits of 12 minutes for any particular clock hour (8 minutes per hour between 6pm and 11pm)

There is no differentiation. A commercial channel is a commercial channel is a commercial channel.