A court was told Tanner became angry when she wanted to spend quality time with her children in the sun.
Tanner, who has previously been jailed for attacking another former partner, refused to accept the relationship was over and he turned up at her Folkestone home.
In a bid to contact her, he also made repeated phone calls, left her multiple voicemails and even approached her daughter.
Other attempts to woo her back included ordering an engagement ring to her home and following her while she was out – all of which was said to make her feel stalked by Tanner.
Matters came to a head when the woman texted Tanner in May, saying she had had enough.
But instead of leaving her alone, he turned up at her front door in an effort to reignite the relationship.
When she tried to slam it shut, he pushed it with his arms into her face with such force she sustained a large lump on her eyebrow, a headache and a concussion.
Tanner, of Dover Road, Folkestone, was later charged with stalking, assault occasioning actual bodily harm and assault by beating.
He initially denied the allegations when he appeared in court, but when he reappeared on June 19, he changed his pleas to guilty.
At that point, he was remanded in custody and a pre-sentencing report was ordered before he appeared in the dock at Margate Magistrates’ Court on July 10.
Julie Farbrace, prosecuting, told the court Tanner entered his plea on the basis of the stalking charge – which was not accepted by the Crown – and the ABH charge, on the grounds he had acted recklessly rather than deliberately.
Ms Farbrace added: “She met him in August last year and they had an on-off relationship and went on holiday in March this year, but two days later they split up.
“She’d seen a different persona to him, and there was a room altercation when she wanted to be with her children.
“He didn’t take it [the break-up] very well, and they had a shared friend, and she wasn’t allowed to be friends with this person, so she called him two-faced.
“She broke up with him and told him she didn’t want any contact, but he didn’t accept this and turned up at her address.”
The court heard he turned up at her house on May 11 after she made a positive reference about him on Facebook.
But she slammed the door and said he did not want to be friends any more at which point he pushed the door into her head.
The court heard the woman was left with a headache, concussion, a large lump on her eyebrow and her knuckles and foot were bruised.
Ms Farbrace said: “He said it wasn’t intended to hurt her, but admitted he was reckless.
“He said he was sorry in a message, but he was arrested as it was all too much for her to handle.”
Magistrates were told the initial police investigation into the matter was dropped and Tanner was not charged.
But when the victim later contacted him, Tanner got his hopes up and he continued to send messages and flowers, the court heard.
The woman then reported the incidents to police and Tanner was charged.
Ms Farbrace added: “He admitted in an interview that he had harassed her by sending flowers and messages. I am asking for a restraining order.”
The court also heard the assault by beating offence happened between December and January 1, this year, after the couple had been on a night out and Tanner accused her of flirting with another man.
Ms Farbrace added: “He slapped her in the face, she had her daughter with her and she was left with line marks on her face for a few days.
“The door [pushed in her face] was a weapon equivalent, but he said he did it on a reckless basis [rather than to deliberately harm her].”
Magistrates also heard Tanner has previous convictions for separate domestic violence-related incidents, including custodial sentences for suffocation, harassment and threats to damage and violence against person.
Ian Bond, defending Tanner, invited the bench to follow the recommendations of the pre-sentencing report and impose a community-based punishment with rehabilitation days, which would include attending a building better relationships course.
He added: “The presence of children is an aggravating feature, but he’s genuinely remorseful and he told me he made a number of mistakes and is truly sorry, he’s totally ashamed.
“The stalking: he wanted to make amends [after the door incident].
“He had early childhood problems and has ADHD and unstable personality disorder, so he has issues, and these manifest when he’s in an intimate relationship.
“He’s engaging with mental health services.”
Magistrates told Tanner he would be handed a suspended sentence despite the report’s recommendations.
They jailed him for 32 weeks for all the offences, but suspended the term for 18 months and ordered him to complete 20 rehabilitation sessions and attend a stepwise relationship course.
He was also ordered to pay £307 in court costs and a victim surcharge, and will pay what he owes the court at a rate of £20 a month.
Tanner was also issued with a 12-month restraining order banning him from going near the woman’s home or contacting her.
