“Police arrest peaceful anti-monarchy protesters & have erected giant barriers to obscure pro-republic banners. Right to freely protest suppressed. Shame!,” read a retweet on the Alliance's account from British human rights campaigner Peter Tatchell.
The UK police and government officials had previously announced they will not oppose rallies against Charles III Coronation.
According to reports, policing operations planned for the ceremony is among the biggest and costliest in the history of England.
Charles III Coronation is expected to charge taxpayers £250m at a time many people in Britain are struggling with inflation and exorbitant prices.
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