He has policed student riots, football matches and state funerals, so a break was on the cards for a brave London police horse. But 17-year-old Chiswick has spent his retirement having serious surgery.
Vets noticed there was something wrong when the horse went right off his food and started losing weight rapidly.
Ria Chatterjee has his story.
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Rahman was ejected from his powerful job in April by an Election Commissioner after being accused of corrupt and illegal practices.
The service was due to start in September but there is no agreement on pay and conditions such as how many night shifts staff will work.
Would you know what to do if you needed help? Here's the official advice from the Foreign Office.