You know the scenario I am sure, you flush the loo and think no more, however, the water starts to rise nearly up to to the rim and then really slowly starts to go. However, do no panic or grab the phone just yet. Stay calm calm. Obviously something has caused a blockage stuck somewhere and there is a good possibility that you will be able to clear the loo by yourself. But if you think that this kind of job is not for, you can call a professional plumbing service like Abbey Wood Plumbers who use skilled professionals. The best way to sort this problem is with a plunger. You could already have a cup shaped sink plunger that you could use, but it can be quite messy. The plunger works using the principle that the rubber vessel will make an airtight seal down in the loo. So, if you don’t have one, buy a loo plunger that will seal the opening at the bottom of the pan. The cost will be no more than £10. Some pumping and you should create enough pressure to free the block. A Thamesmead Plumber is a fully qualified professional plumber who understands all types of issues. The plunger can usually be quite effective, but should the pan remain blocked after the plunger has been used the blockage is further along the pipe, perhaps caused by air simply getting in through the open vent pipe at the top of the drain. This type of blockage further along the drainpipe may also affect many other appliances in your home such as sinks and baths and may put them out of action causing a much more convenience than normal. This is probably the time to seek professional advice if it is bigger than you thought, as it might mean that you will end up going around in a circle.