Why aren’t Bailiff companies in the UK regulated?

Finance seems to be a really heavily regulated industry these days. I believe that at one point finance/wealth management was the second most heavily regulated industry after Nuclear Power.

However, debt management/balliffs seem to almost have free rein to do what they want with very little consequences, even though the use of scare tactics can literally cause people to kill themselves. How and why have they managed to stay fairly unregulated compared to other industries?