My friend and former colleague Mike Alexander, who has died aged 77, made a huge contribution to nature conservation in Wales and beyond....

My friend and former colleague Simon Rietbergen, who has died aged 65 from multiple brain tumours, was a forestry expert who worked extensively...

Without my friend and colleague Melanie Quin, who has died aged 66, British and European hands-on science centres would be very different places....

Without my friend and colleague Melanie Quin, who has died aged 66, British and European hands-on science centres would be very different places....

TonnyMy friend Tommy Gee, who has died aged 100, was a progressive colonial service administrator during the 1950s and 60s in Uganda, where his...

TonnyMy friend Tommy Gee, who has died aged 100, was a progressive colonial service administrator during the 1950s and 60s in Uganda, where his...

My father, John Lewis, who has died aged 92, played a leading role in the development of buprenorphine, used successfully to treat millions of people...

My father, John Lewis, who has died aged 92, played a leading role in the development of buprenorphine, used successfully to treat millions of people...

My mother, Jill Freud, who has died aged 98, was a dynamic actor and producer, and the founder of one of the UK’s most cherished summer rep...

My grandfather Abu Zafar, who has died aged 88, was an engineer, inventor and co-founder, with his wife, Hisako, of the first Asian-owned printing...