What would earn more; a television presenter on a small UK channel, or an estate agent in the UK? (Both with a few years experience)?

Presenter.
The Presenter would be on salary.
the Agent would be on Commission.

Market fluctuations would severally affect the income of the agent, while the presenter would collect his/her salary every month. Either would be affected by downsizing equally.

Most EA are on commission and the house market is not booming.
TV presenting is hard to get into. They don't advertise.
UK

Depends, is the estate agent specializing in Russian Oligarchs in London? Is so, estate agent...no question.

If you are really good as a presenter though...there is tremendous room for growth, but its a really hard industry.

which ever pays more