[4] Between September and November 2024, Borthwick competed in the twenty-second series of the same show and was paired with professional dancer Michelle Tsiakkas.

[5][6] Borthwick carried boxer Kevin Mitchell's championship belt into the boxing ring prior to a bout in July 2007.

[9] In January 2019, it was announced that he would be running the London Marathon with some of his EastEnders co-stars for a dementia campaign in honour of Barbara Windsor.

His lawyer appealed the ban, stating that Borthwick is recognised whilst using public transport, and "not all of these encounters are favourable".

[11] In December 2023 Borthwick dismissed speculation that he was dating former co-star Danielle Harold who notably played his on-screen wife Lola Pearce-Brown.