The reason that many newspapers, both national and local, are struggling (or, like The Independent, have gone completely online) is that hardly anyone advertises in them these days. Indeed, not many people buy print newspapers at all.
A few years ago, the BBC asked a class of around 30 student journalists how many of them had bought a newspaper that day. Not one of them had. If nobody buys them, then nobody will advertise in them and I'd be amazed if you could find many (any?) coach firms doing so these days. The ONLY place that they now advertise is online (or possibly through some of the last remaining High Street travel agencies).
So check out these websites:
https://www.shearings.com/coach-holidays/europe
https://www.leger.co.uk/coach-holidays
https://www.nationalholidays.com/europe
https://www.harryshaw.co.uk/europe-by-coach/
https://www.newmarketholidays.co.uk/holidays/europe
https://www.justgoholidays.com/coach-holidays-europe-supervalue
https://www.grandukholidays.com/coach-holidays-to-europe
https://www.alfatravel.co.uk/europe-ireland/
It's worth noting though that due to Brexit uncertainties (especially the massive queues at some ports), some companies that used to operate holidays to Europe (such as Gee Vee in Sheffield) are currently not doing so.