They have form for this sort of thing

On BBC news website you'll often see a plea for people who witnessed a breaking story to email in footage or pictures.

Look at the T&C's .... The BBC claim the right to use your footage in perpetuity, and licence it to other news organisations.

Fekkem. I got wise to this sort of scam back in the 80's. As a keen amateur photog, I often saw competitions in magazines. T&C's tended to be similar, and copytheft assumed for every entry.

These days, the legitimate competitions are much better. Typically the competition operator will only want the rights to licence winning pictures for limited use FOC. The Copyright owner is more than able to licence anywhere else they choose.