I am very proud to have worked with the BBC for 30 years. I had hoped to continue to work for the corporation but that is no longer possible. - Mark Tully

During the nine years that Calcutta was my home, I lived a life which would now be seen as thoroughly politically incorrect. From our youngest days, we were never allowed to forget that we were different - we were English, not Indian. We had an English nanny who saw to that. She supervised us 24x7 and once, finding me learning to count from our driver, she cuffed my head, saying "that's the servants' language, not yours". Inevitably, we were not allowed to play with Indian children. There were even class barriers to the European children we were allowed to play with. My nanny would not allow us to play with children who only had Indian or Anglo-Indian nannies because their parents couldn't afford a "proper nanny", as she saw herself. European society in the Calcutta of those days was divided by a strict class system, not dissimilar to the caste system. Members of the ICS, were considered the Brahmins (the elite caste), while the members of the Indian army were regarded as the Rajputs (the warrior caste). As a businessman, my father was a Vaisya (trading caste), dismissed by the snooty ICS and army as a mere "boxwallah".

I remember, too, the kudos being born in Calcutta gave me by making me stand-out as a rarity when, at the age of 10, I found myself in the highly competitive society of a British boarding school. To boost my kudos even further, I would boast that I was born in the "Second City of the British Empire".

Since I expressed my views...in July last year, I have sought to negotiate a position which would allow me to defend my stance in public, especially when it is questioned. The BBC has required that I do not speak on matters on which my stance is already known. That is not acceptable to me. I have therefore asked the corporation to accept my resignation as South Asia correspondent.