Councillor Neil Wilson, cabinet member for health and adult social care and ward councillor for Plaistow South, died on July 30.
He was the borough’s longest serving councillor, having served for more than three decades.
Mayor Rokhsana Fiaz OBE said: “We are desperately sad and heartbroken to learn of this saddest of news about our dear friend and colleague.
“Neil was ‘Father of the Council’ and gave over 30 years’ service to the borough and the residents that he cared so much about.
“We are all in shock at this news and will miss him terribly.
“Neil’s faith was so important to him and we are comforted to know that he is with the Lord he loved.
“He is in our thoughts and prayers.”
Councillor Sarah Ruiz, deputy mayor and cabinet member for children services and education, and sustainable transport, added: “Neil was a very dear friend and colleague.
“His beliefs shaped him and his values, and his life of public service – as a teacher, and as a councillor.
“Neil was loved and respected by member colleagues across the chamber, and by all the council officers he worked with, for his experience, dedication and commitment to the borough and people he loved – and his sense of joy and fun.”
Councillor Simon Rush, a close friend of Mr Wilson, described the news as “heart wrenching”.
“We will dearly miss Neil as we found joy in speaking with him and the advice and mentoring he gave to members as the Father of the Council.
“He was always there for sound advice or a simple chat.
“He will be missed.”
The council said it would be publishing details of planned tributes to Cllr Wilson.
