Outside The Shard, crowds gathered and commuters stopped to take pictures of the protesters as they progressed several hundred feet up.
The women are climbing in two groups - three in each.
They are currently about halfway up and appear to have stopped for a break.
More top news
Chester has a proud political legacy. But now this once-safe Tory seat is one of the key 2015 battlegrounds
A Ukip candidate has been suspended two days before the election, as a video emerged apparently showing him threaten to shoot his Tory rival
A man has been charged with stealing his own barrister's mobile phone at a magistrates' court in Bexleyheath, Kent.