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Hi I have a two bed house,when I have a shower, every now and then the basin next to the bath(where I'm having a shower)gurgles,can you tell me why please, my house is only ten years old I would like to know WHY it does it and what reason for doing it someone emailed me and said it's the toilet trap its got nothing to do with the toilet the noise is coming from the basin so what could it be.thanks

I think the e mailer is right, could be the toilet trap. The noise can't come from the toilet so its coming from the next best thing, the drain pipe, ergo the sound from the basin.

Your gurgle is due to your vent stack becoming clogged. With the vent clogged the shower drain is trying to vent to any other fixture, in this case the basin. Rod out the vent stack from the roof. Use enough 1/2" snake to rod roof to basement floor and about 15' more.