The personal data rules in the UK are essentially the same as those in the EU, but with a huge exemption for "insurance purposes". So it's unlikely that there is a systematic data protection roadblock in the UK that you wouldn't encounter elsewhere in Europe. I can't think what rule you're referring to, so I suspect there was a misunderstanding, perhaps unique either to the company/broker you were dealing with, or unique to you.
I tried multiple companies, and I’m a pretty normal German resident. They all said they’re not allowed to talk about insurance matters with people not residing in the UK. So we basically ended up having a UK person relay all communication, since that is apparently fine.
