Toilet mystery

[Glogan]

Hello

i recently began seeing some brown/black bits coming back into the toilet pan after flushing together with bits of broken up tissue paper. I have one toilet in the house and the bath and sink are next to the toilet with the bath being furthest from the soil pipe exit and the toilet nearest.

The bath and sink drain with no issues but for some reason I am getting air bubbles and what seems to be back flow.

where might the clog be as I am out of ideas now.

Thanks a lot

 

[lame plumber]

probably find the soil pipe has a blockage and not clearing away, have a go down the pan with a rubber plunger, check manholes on drains are all clea as well, no joy get in a plumber with some rods to clear any blockages, you dont need to pay dynarod a fortune for a drain flush!