I have a problem with my drainage. It was all fine till we had this storm a few days ago. Any suggestions on what it may be?

If you had a storm a few days ago and it started at about that time. Have a look on your roof and see if your vent stack which some people like myself call it a stink pipe is covered. It a small black pipe on your roof that most likely will be above your bath room. If it is covered with snow. Then clean it free from the snow. If there is a build up of snow in the pipe or ice pore windshield washer fluid down it (needs to be for cold temperate range for-45). Hope this works for you.

I just had a plumber over to fix the problem and it was from the snow build up. I did mention to the plumber about the windshield washer fluid down the vent and he said that that would be a great idea because other people us hot water and found out later that it froze there vent pipe again. So cuddles to you Questionshelp. I guess you do learn new stuff every day.