I've worked in Folkestone on several occasions, interviewing people on a footpath/cycle path just down the road from a big hotel used by National Holidays, who operate coach tours from (what I believe is) your part of the world, GG.
As a result of that, I've got into conversation with lots of people who've travelled with National Holidays and they've all had nothing but praise for them.
They're also amazingly cheap. For example (a year or two ago) I was meeting people who'd travelled from northwest England for a 3 night stay in Folkestone, with dinner bed and breakfast, in a good hotel with evening entertainment provided each day. (I've stayed there myself; it was really nice). The holiday included a tour of Canterbury and a hop over the channel to visit Bruges. The entire cost was just £99 per person!
Looking at what they've got coming up from Blackburn (which I believe is near to you) shows the following:
2 nights in Scarborough £99
3 nights staying in Wolverhampton, but with visits to Hereford & Shrewsbury and an evening tour of West Midlands Safari Park £99
3 nights to Loch Lomond and the Ayrshire Coast (staying in Prestwick) £99
3 nights to Oxford, Stratford, Royal Leamington Spa & Banbury £95.04
2 nights to the Cotswolds £99
2 nights to Cardiff Bay and the Wye Valley £119
1 night to Warwick Castle & Chatsworth £79
1 night to Beverley Market & Bridlington £69
1 night to Ironbridge Gorge & Severn Valley Steam £79
1 night to Stratford & the Cotswold £59
1 night to Skipton Market, Hawarth & Emmerdale £59
1 night to Banbury Market & Oxford £69
3 nights to York & the Yorkshire Dales £99
. . . and those are just the really cheap holidays available before the end of this month! There are loads more available later in the year, as well as more expensive (and longer) trips to Ireland and to the continent.
Worth a look perhaps?
http://www.nationalholidays.com/departures-from-north-west