Claim: 670,000 people marched for a People's Vote in London on Saturday 20 October
Fact-check: Did 670,000 march for a People's Vote on Brexit? - Full Fact
Verdict: this is an estimate by the organisers of the march. we can't say for sure if it's accurate or not, but it may be on the high side.
Organisation: Full Fact
Author: Abbas Panjwani
Date published: 2018-10-24T00:00:00