An Olympic showjumper drew a picture of a three foot penis on a Tory peer’s floor in pig’s blood when their affair ended, a court heard.
Lizzie Purbrick, 63, broke into David Prior’s Vauxhall flat armed with five litres of blood and a garden sprayer to write messages on the floor and walls.
They included ‘whore,’ ‘lady slut,’ and ‘Mags wet between the legs.’
She also wrote ‘big d**k Lord’ next to a drawing of three foot penis on her former lover’s floor.
Purbrick then spread blood on the linens and emptied the rest onto the floor.
She then wrote a cheque for £1,000 with a note saying: ‘For the Bull,’ Camberwell Green Magistrates’ Court heard.
Prosecutor Alex De Sautoy told the court how neighbours were alerted after blood leaked out of the front door.
‘Neighbours saw someone enter the flat who they believed to be a man,’ he said.
‘There was loud music playing and they saw red liquid coming from under the door onto the pavement.’
Police were called at 10:36pm and Mr Prior returned home around 11pm.
Purbrick turned herself into Kings Lynn police station the next day.
Her lawyer Simon Nicholls described how the affair broke down.
He said: ‘To put this delicately, it ended because she discovers him in the arms of another woman who is married to another member of the House of Lords.’
Mr Nicholls also told the court of how Purbrick’s brother was dying from cancer at the time of the incident.
‘This is a one-off incident, there were no problems before and no problems since,’ he added.
‘It was a one-off incident caused by the rapid breakdown of a relationship.
‘At 63 she has acted in a way that is completely out of character.
‘The whole incident was cathartic.’
Purbrick won the coveted Armada Dish at 1984’s Badminton Horse Trials and competed at the World Championships in 1978 at Lexington, Kentucky.
After jumping in the 1980 Olympics in the then-Soviet Union, she was a member of the gold medal-winning team at the European Championships the following year.
The 63-year-old peer, whose official title is Lord Prior of Brampton, married Caroline on Valentine’s Day in 1987 and they have two children.
They are believed to be separated. The Cambridge-educated Lord is a prominent Remainer and has rebelled against his own party in a bid to derail Brexit.
Purbrick, of Warren Farm Stables, Kings Lynn, Norfolk, admitted criminal damage.
Lizzie Purbrick was later ordered to complete 120 hours unpaid work and banned from contacting the Tory peer.
District Judge Susan Green said: ‘Lord Prior came home to police in attendance at his flat.
‘A neighbour was unsure if the red liquid was blood or juice and police rightly forced entry, fearful of what they might find.
‘What they did find was a very large amount of blood over the floors and walls in various locations.
‘There were a series of highly abusive slogans on the wall and floor that were clearly derogatory to Lord Prior and his new partner.
‘They were, in my view, quite appalling.
‘This was a completely disproportionate response to the breakdown of the relationship.
‘I do not accept for a moment that this was spontaneous – this was planned and premeditated.’
Purbrick was ordered to complete 120 hours unpaid work and pay £85 in costs.
The judge also made a restraining order banning her from contacting the Tory peer or going to three properties in London and Norfolk.