In 1837 he returned to Britain, wrote extensively in British periodicals, like "The Athenaeum", and in publications of the SDUK, like "The Penny Cyclopaedia for the Diffusion of Useful Knowledge" and "The Biographical Dictionary".
В Лондоне Гаянгос сотрудничал с учёными и просветительскими кругами, особенно с "Society for the Diffusion of Useful Knowledge", а также писал статьи для «Атенеума» и "The Penny Cyclopaedia for the Difussion of Useful Knowledge and The Biographical Dictionary".