Earlier quoted context omitted.
I used to work for a startup founded by a few Brits. We had engineers in London, but no sales people, because of the culture. I was much easier to sell to Walmart than Tesco.
like the author we're light on details beyond "the culture", "bad at sales". What does this _mean_ exactly?
Customers too risk-averse, class boundaries still endemic (it is amazing the US tech companies went into this, Google/Facebook/etc. seem to have hired the Notting Hill set as soon as they came to London), companies too conservative about investing margin in sales, very relationship-driven sales culture (as opposed to product-driven) that is closed to "outsiders", reluctance to cold-call, etc.
It is cultural because it can be anything else, do people from the UK have a different biology? No. I think if you look at politics in the UK, it is self-evident that the culture of the UK is not exactly entrepreneurial...unless you believe that a group of probably 30-50 people who went to the same school, went to the same university and largely studied the same course should rule the country...it is very weird.