Hi Andy
my house has a small minton entrance - and I mean small - if only they had laid the hall out I would be chuffed to bits.
I have just taken them up - they were laid on concrete, laid on shale/shingle.
Most of the tiles came up easily, but some insisted on bringing their substrate with them. I soaked them over night in soapy water and after spending 2 hours with my dremel and getting a diy version of white finger! ( painful) I used my bench grinder to clean the tiles up. Took a few hours for my small area - so be warned.
Some of the tiles that looked sound weren't and I will have to replace somehow, so allow for that.
I checked on new tiles and at £100 to £180m2 I decided to go with what I had - what ever I do it cant be much worse. But if it was a bigger area and the tiles had been more difficult to lift and clean - I would have considered new.
Will clean them tomorrow and lay on sat or Sunday
frogeye
ps - thank god for the spell checker after umpteen g&t's
