I can't speak for the exactness of the figure, but it certainly seems plausible. According to this article about arrests for online posts in London 857 arrests were made in 2015 in London alone as a result of online activity. However this can include emails as well as social media. The reason is:

The Communications Act 2003 [which] defines illegal communication as “using public electronic communications network in order to cause annoyance, inconvenience or needless anxiety”.

That's a very wide definition.

Offences include:

alleged sexual offences, including grooming, as well as complaints of stalking, racially aggravated conduct and fraud.

Note that there is no suggestion that any of the arrests are solely for posting things that disagree with the government. By contrast in Russia you can be arrested for saying online that Crimea does not belong to Russia.

I can't speak for the exactness of the figure, but it certainly seems plausible. According to this article about arrests for online posts in London 857 arrests were made in 2015 in London alone as a result of online activity. However this can include emails as well as social media. The reason is:

The Communications Act 2003 [which] defines illegal communication as “using public electronic communications network in order to cause annoyance, inconvenience or needless anxiety”.

That's a very wide definition.

Offences include:

alleged sexual offences, including grooming, as well as complaints of stalking, racially aggravated conduct and fraud.

Note that there is no suggestion that any of the arrests are solely for posting things that disagree with the government. By contrast in Russia you can be arrested for saying online that Crimea does not belong to Russia. This is useful information because the claimant (Kisin) is clearly trying to compare UK and Russia.

I can't speak for the exactness of the figure, but it certainly seems plausible. According to this article about arrests for online posts in London 857 arrests were made in 2015 in London alone as a result of online posts. The reason is:

The Communications Act 2003 [which] defines illegal communication as “using public electronic communications network in order to cause annoyance, inconvenience or needless anxiety”.

That's a very wide definition.

Offences include:

alleged sexual offences, including grooming, as well as complaints of stalking, racially aggravated conduct and fraud.

Note that there is no suggestion that any of the arrests are solely for posting things that disagree with the government. By contrast in Russia you can be arrested for saying online that Crimea does not belong to Russia.

I can't speak for the exactness of the figure, but it certainly seems plausible. According to this article about arrests for online posts in London 857 arrests were made in 2015 in London alone as a result of online activity. However this can include emails as well as social media. The reason is:

The Communications Act 2003 [which] defines illegal communication as “using public electronic communications network in order to cause annoyance, inconvenience or needless anxiety”.

That's a very wide definition.

Offences include:

alleged sexual offences, including grooming, as well as complaints of stalking, racially aggravated conduct and fraud.

Note that there is no suggestion that any of the arrests are solely for posting things that disagree with the government. By contrast in Russia you can be arrested for saying online that Crimea does not belong to Russia.