Soil and pebbles next to house cashing rising damp?

... in addition to the informative answer by the member from Stockport: Locate the drainage chamber in front or at the back of the house. Connect a PVC pipe the length of the house wall to the drainage chamber. You might have to dig a channel approx 40cm wide and 50cm or more deep (depends on the level of the drainage chamber. Make sure there is a slight slope towards the drainage chamber connection point. Cut with angle grinder gaps across the pipe at 5cm distance each. Fill the channel with large pebbles. Make sure the overall level of the finished channel once filled up with pebbles is 2 brick courses under your DPC or air brick (if positioned correctly - often they are not, check first ). On the interior of the affected rooms with damp exterior facing walls on ground level: Remove the existing plasters and renders back to brick. Apply a 3 coat non hydraulic lime plaster system. No cement renders or gypsum plaster coatings! The walls will dry slowly, but it can take several months or even a year if saturated with water. Remember, it took a long time to get to this stage. Once everything has dried out, apply only paints that do not contain plastics such as latex etc. You can use clay paint for example. In this contest: Injections don't work, plasticised cement render(s) don't work (too dense), guarantees are worthless and a waste of time.

I would first recommend getting rid of the 10cm gap and installing a eco drainage system to carry water away.....water is constantly soaking onto the external brickwork and it will be penetrating up from underneath......if its excessive water even a damp course and infections will fail

Rising damp is caused by water rising through the ground and into the walls of a building. This can be caused by a number of factors, including a lack of a damp-proof course, porous building materials, defective guttering and downpipes, and a high water table. In your case, it is possible that the soil and pebbles next to your house are contributing to rising damp. However, it is also possible that there is another problem causing the rising damp, such as damaged render or plaster.