"Lock on" protesters have used things like bicycle locks and handcuffs to shackle themselves to railings or each other. These are difficult to cut without injuring the person, especially if they're not cooperating.
Here's the Public Order Act, rushed through and taking effect from 3 May, with the coronation on 6 May: https://www.legislation.gov.uk/ukpga/2023/15/enacted
I'd argue cable ties, straps and string aren't capable of causing "serious disruption", and I assume the police/prosecutor agree. It's very concerning that the police made the arrests anyway.
(I also disagree with the law, but I'm more concerned that the police abused it.)
The protestors arrested say a) they were reversible plastic straps (i.e. no use for human locking on at all), and b) they had discussed their plans with the official police liaison team who approved it all before the event, then the police on the ground refused to care about that nor tried to discuss with the liaison team while making the arrests.
There's also various clips going round, for example this police officer saying they "might" arrest people just for chanting "not my king". Which is just blatantly wrong, albeit possibly down to incompetent officers as much as bad policy (though bad policy seems likely). https://twitter.com/francesleach_/status/1654789805685854208...
Nonsense, all you need to tie a sign to a pole is a piece of string that wouldn't hold a human body. If they want to keep that legislation in it should be specific - things like handcuffs, heavy chains with padlocks.....even that I think is an overreach, but it would be better than whatever the law says now.
Personally I think this has generated renewed interest and publicity for the republican movement, which means in a way, the protest has been a success due to the police action.
I'll not be at all surprised if later this year the Metropolitan Police arrest protesters from linking arms while surrounding a building or blocking a road.
> which turned out to be luggage straps.
https://www.theguardian.com/uk-news/2023/may/09/labour-says-...
Easily cut or removed in either case.
For the record I do not think locking on should be criminalised in general in the first place, much less for it to be preemptively policed based the discretion of some copper.