I think one of the most important abilities that we must have in cross-cultural contexts is to find a common ground. In other words, it is the ability to still understand and relate to others even when there are myriad differences in between.
After watching the documentary, I actually can relate to some of the "very British problems". For example, British people tend to hide their true feelings and veil their thoughts in words, which is also something that we Chinese also tend to do in most occasions as a way of maintaining the propriety of the speaker. This may because that both Chinese culture and British culture are a ‘high-context culture’ where non-verbal behaviors, tone, expression and background are as important as words to successful communication.