Upvote:1
I don't know much about the Ahmaddiya movement, but to my knowledge, the British had taken over all India well before he was born. The British, after defeating Maratthas, had control of the whole of India except Punjab, which fell after the Anglo-Sikh war after Maharaja Ranjeet Singh. Between 1830 and 1856 the British even went ahead with their war with the Afghans. The point is that the British had control over all of India and whatever resistance offered by the combined Hindu-Muslim army during 1857 was decimated. Delhi, along with Lukhnow, were the only cities where prominent Muslim families were found were dispersed/exiled.
Maybe the rumors that he was working with the British were spread by those who didn't believed in his sect. To add more to this, before the East India Company came to rule the whole of India, Muslim rulers were left only in Awadh, Delhi City & in Deccan (Nawab of Hyderabad). The rest of India was ruled by either Maratthas or the East India Company.
Source: The siyar-ul-Mutakherin, History of Marattha by James Duff, & The last Mughal