The London GP is connected to the group Hizb Ut Tahrir which I believe is banned in Bangladesh but not the UK according this report which also says
"According to Swedish broadcaster SVT, Hizb Ut Tahrir has been distributing leaflets at many homes in the Rinkeby area, with the agenda of encouraging Muslims in joining the group. Locals in Rinkeby has lodged complaints with Swedish police asking whether the contents of the leaflets are legal. Martin Marmgren, group manager for the police in Järva, commented on the pamphlets, saying: “Some people are worried. This is an extremist message from an extremist organization”.
Hizb Ut Tahrir has been operating in Sweden since 2011 and has been running for years in some other European countries, such as neighboring Denmark. As the group opposes democracy, back in 2015, Hizb Ut Tahrir called upon the Danish Muslims to “abstain from voting”, after claiming democracy was not compatible with Islam. It also opposes participation of women in politics and social activities.
In a leaflet distributed in 2015 amongst the Danish voters, Hizb Ut Tahrir said: We are committed to being active participants in our society, but it has to be on Islam’s terms, without compromising our own principles and values. Democracy is fundamentally incompatible with Islam, and it is a sinking ship.
British authorities in 2018, accused Hizb Ut Tahrir of using children to spread extremist literature that provided justification for suicide bombings and stated that women who leave home “uncovered” [without burqa] should be punished..>"
https://www.weeklyblitz.net/featured/uk-turns-into-safe-haven-of-hamas-palestinian-terrorists-islamist-bigots/