A man who was found stabbed to death in North London just days after Christmas has been named as Dr Jeroen Ensink – a lecturer at the London School of Hygiene and Tropical Medicine. The 41-year-old was found fatally injured in Hilldrop Crescent, Islington on 28 December following an "incident".

Timchang Nandap, 22, from Woolwich in south-east London, has been charged with Ensink's murder. He appeared at Highbury Corner Magistrates Court on New Year's eve, and was remanded in custody to appear at the Old Bailey on Monday, 4 January, Scotland Yard said.

Colleagues have now paid tribute to Ensink, describing him as "popular" and saying he would be "greatly missed". They added that his death had left everybody at the London School of Hygiene and Tropical Medicine "deeply shocked and saddened".

Speaking to the Guardian the school's director Professor Peter Piot said: "Jeroen was passionately committed to a simple cause: improving access to water and sanitation in countries where children continue to die needlessly due to the lack of these basic services.

"He was a natural educator and immensely popular with students in whom he invested much time and energy; he provided support and inspiration in equal measure and many of his students are now successful researchers and public health professionals in their own right," he added.

"Jeroen will be greatly missed by all the staff and students who had the opportunity to know and work with him, and the legacy of his work will continue in Asia and Africa. Our deepest condolences go to his family and friends," Piot went on to say.

The newspaper said Ensink joined the school 10 years ago and had been leading a massive study into water improvements in the developing world. He is said to have focussed on the Democratic Republic of the Congo with a view to improving systems and preventing cholera outbreaks.