hopefully this is the right place to put this

anyway, i dont really know anything about renting so i need your advice. me and 5 other people are renting a student house at uni. one of our housemates never pays his rent on time, this morning i went downstairs to find a letter saying that cos he hasnt paid his rent for this month they are going to take court action. however on the letter it says that they arent just going to take him to court but all of us and our guarantors cos we have a joint tenancy. now as i said i dont really know much about this, but can they really take all of us to court over him not paying? all the rest of us paid our rent when it was due 2months ago and its not like we pay the rent altogether as a house, they charge each of us separately. im just a bit worried cos i dont want to have to go to court cos of this, especially as ive paid my rent!

any help would be greatly appreciated, thanks