Originally Posted by
LandingConfig
A quick Google search reveals that there are high speed trains from Hong Kong to Guangzhou that take less than an hour meanwhile the fastest trains from Newcastle to London are around 3 hours. How did you come to that conclusion?
There's a fairly long border control process (the queue stretched for about half a km when I was in Hong Kong) that you'd want to leave plenty of time for. However, you can get a ferry to the mainland from Hong Kong airport without entering Hong Kong via the SkyPier.