If you click through from the main index page
https://www.tesco.com/groceries/en-GB/shop/fresh-food/fresh-meat-and-poultry/sausages?page=1&count=48
to the individual product listings, you'll be able to access customer reviews for each of their sausage brands. Almost universally though, the reviews are a mix of 5-star and 1-star ratings for each product. (i.e. what some people really love, other people really hate).
My own view is that the Richmond ones and the Woodside Farm ones (which Tesco's own 'value' brand) are absolutely fine in casseroles but I'd be looking for something with a bit more flavour for toad in the hole. So I'd probably opt for the Tesco Finest Lincolnshire sausages (or possibly their Finest Cumberland ones).