Yes, we do. One insurer, Holidaysafe (which was listed for a long time in our travel insurance best buys as a cheap 'no frills' provider) is currently excluded because of serious allegations made in The Times in November 2018 about its parent company, TIF. We took the decision to remove Holidaysafe while investigations continue. And as they're ongoing, Holidaysafe (and any TIF – Travel Insurance Facilities – policies) are still excluded.
However, we do link to comparison sites within our travel insurance guides and as they are independent of MSE, they may include providers we wouldn't.
We regularly review our policy on excluded providers and update our guides accordingly.