The Government is selling Royal Mail short by "pressing ahead" with its current sale, despite selling it at a "huge undervalue", the shadow business secretary said.
Chuka Umunna told Daybreak Royal Mail was valued at "between £2.6-3.3 bn" and endorsed by City brokers.
He warned the sale was becoming "a dream" for City speculators but a nightmare for the taxpayer.
More top news
The violence began after a counter-protester allegedly doused a female rally organiser with pepper spray.
As temperatures climb through the day, the warmest spots are likely to be across western parts of Northern Ireland and western Scotland.
The foreign secretary has criticised internet and social media giants for failing to detect and remove extremist material posted online.