Hi, looking for some advice regarding my concealed Grohe cistern. Problem 1 - There is a small amount of water appearing around the right hand side at the base of the tiling which houses the cistern and this has been happening for a few months but hasn't worsened. (I initially thought it was condensation). Problem 2 - Vary occasionally, the cistern continues to fill until it overflows into the pan. This happened tonight, first time in ages but simultaneously there was some increased seepage from the tiles whilst the cistern was re-filling. I wiggled some bits inside the cistern (clearly I'm not a plumber ) and stopped the continuous filling but the steady seepage continues. Help! Problem 3 - A few months ago I consulted the plumber who fit the toilet in 2014 and he said it might be best to replace the whole thing with a standard toilet. Not ideal as it would mean re-tiling etc and not to mention the ridiculously expensive light up flush plate I bought would be redundant So, in short I would love to know if this is a flush valve issue, a leak from the the flush pipe, both or something else. Either way do I abandon hope of fixing and replace the whole thing or should I find a new plumber who can fix? Many thanks in advance for reading through to this point..