Broken concrete -can you lay tile or brick over it?

Personally myself I will take you up then replace with MOT type one to a correct level so when you lay the new slabs you have no problem with movement underneath thanks Wayne

Like said before, I’d take up exciting flags, broken concrete with micro digger. Grade all beneath with a level bucket of the digger Lay a membrain down then mot level it all out

Depending on the thickness of concrete and the base below and where raised beds would be and heights according to dpc and what sort of stone you are laying it may be possible to go on existing but generally it is better to dig out and start from scratch

I would recommend doing some tests to the concrete, checking depths of concrete and to see whether there is any damage or crumbling concrete. The gaps could be movement joints. hard to tell without seeing the concrete itself. again, it depends if you are laying porcelain tiles, they tend to be laid on a concrete base. so, if the concrete is suitable to lay on then by all means carry on. a good 100mm MOT base is preferred for me. I would offer the client 2/3 options. 1st being to lay on the concrete base if suitable with no liability for future damage for of course the cheaper quotation. 2nd being to take up and lay on a 100mm subbase being medium price. And the 3rd option for laying porcelain tiles being laying a concrete base of course at a higher price.