Shocking footage of the moment a City banker allegedly feigned unconsciousness after bludgeoning to death a high-class escort in a cocaine and champagne-fuelled attack has been shown in court.

Jurors at Lewes Crown Court on Thursday watched as police officers discovered Zahid Naseem lying on a sofa wearing nothing but a dressing gown as Christina Abbotts lay dead in her bed in the next room.

The West Midlands-born "socialite", who led a party lifestyle in London mixing with "posh" and wealthy friends, was hit 13 times on the head with a pestle on May 25 - her 29th birthday.

Her family and friends thought the "privately educated city girl" and "social media addict" worked in IT.

But the former student of the Royal Agricultural University in Cirencester and Oxford Brookes University drop-out was leading a secret life as a high-class escort.

She advertised her services under the name Tilly Pexton on AdultWork.com and earned up to £3,500 a time when she met Naseem, who denies her murder instead claiming he woke to find her dead.

Her body was found by police in the top-floor flat she had been house-sitting for friend Peter Nuttall in Crawley after worried friends started searching for her when she failed to turn up to her birthday party in South Kensington.

Naseem stayed in the flat for 12 hours after her death - drinking, taking drugs and sending pornographic pictures and videos to other escorts, prosecutor Christopher Tehrani previously told the court.

Footage captured on police body-worn cameras showed officers breaking into the flat and shouting "there's someone else in here" when they found Naseem after discovering Ms Abbotts' body.

The 48-year-old - dressed in a dark suit, white shirt, green tie and glasses - sat in the dock and looked at the floor, cupping his chin with his hand, for the majority of the time the footage was played.

As the camera moves around the sitting room, white powder is seen on a book by the computer, empty bottles and wine glasses cover a coffee table and women's underwear is seen on the floor.

In the recording, officers discuss whether Naseem is dead, but then call for an ambulance when they see his eyes moving.

Stewart Plumbley, the first paramedic on the scene, can be heard saying: "Wakey, wakey. I know you can hear me.

"Come on mate, you can open your eyes, I know you can hear me. I know you can open your eyes."

Naseem remains in an apparent slumber in the back of the ambulance before waking with droopy eyes in a hospital bed, telling officers he felt "terrible" as he is arrested, the footage showed.

When questioned by officers hours later, he bursts into tears and holds his head in his hands before saying: "I have got nothing to hide."

Describing himself as someone with "OCD" who is a freelance risk manager for large trading firms and investment banks, Naseem said he had been working in Toronto-Dominion Bank's London office before leaving to spend the evening with Ms Abbotts.

He told officers the pair took an Uber taxi to the West Sussex town's Asda supermarket because "there was no Waitrose around", buying bottles of her favourite champagne Veuve-Clicquot.

CCTV captured Naseem appearing to kiss Ms Abbotts on the head while they stood in one of the aisles.

This was the last time they were seen publicly together and she is thought to have been killed the next day, the court previously heard.

When asked by interviewing officers what he could see around him when he arrived outside the flat, he replied: "I followed the pretty girl with the nice dress on. I wasn't paying attention."

He said her flat was a "tip", adding: "Other people seem to think the floor is the best place to store clothes and not necessarily fold them."

He said the pair then "pretty much spent the evening naked, being intimate, drinking and taking drugs" and also having a bath together, adding: "We continued doing lines all night and into the morning."

Describing their relationship, he said she was "bubbly" and "very friendly" but "dogmatic", adding: "I wouldn't say she was an escort. She's some sort of socialite. The city's full of people like that."

Explaining her line of work was not uncommon, he said: "She's not the first and she's probably not going to be the last", adding: "There are lots of very well-educated young ladies who realise there is another side income that's available if they meet the right people."

The trial continues.