Tamara Ecclestone
F1 heiress Tamara Ecclestone has dumped Omar Khyam after seeing a film of him allegedly cheating on her Twitter

Tamara Ecclestone has dumped the man she planned to marry after a smutty tape of him having sex with someone else surfaced.

The daughter of Formula 1 tycoon Bernie Ecclestone called time on her two-year relationship with stockbroker Omar Khyam when she found out that he cheated on her during a friend's stag night.

She is said to have kicked him out of their west London home and changed the locks.

The heartbroken socialite revealed that she felt "sick" after finding out about the seedy tape.

In floods of tears, she told the Sun: "He's admitted it - it's over. I feel sick.

She added: "I have spoken to Omar and he has admitted that it's true. I have spoken to my dad and I have spoken to my family.

"I don't want anyone else to go through what I have gone through. I feel sick about what has gone on. This will draw a line under it. I am happy for you to print this story."

Khyam has denied cheating on the model and has claimed that the tape was made before he got together with Ecclestone.

He said: "This wasn't a relationship. This was my friend's stag. We were all messed up and drunk. I didn't even know what the hell it was.

"Tamara is being hot-headed. I dispute everything. This was before I was with Tamara.''