If you have a macerator toilet pump fitted in your home please place a polite notice in the vicinity of the appliances it serves reminding users not to flush items larger than toilet paper.
The macerator takes water from your larger waste pipes, converts it into a much small mass and pumps it to waste through a small diameter pipe. Flushing items larger than tissue paper can block the macerator leading to the waste water backing up, over-flowing the toilet and coming up through plug holes in sinks, showers and bath.
If you have had any electrical work carried out on your home which may affect the supply to the macerator check its operation before the electrician leaves site. If there is no power to the macerator the pump will not operate and once again waste water can back up.