Early Day Motions (EDMs) are used by MPs to express their opinion on something or to draw the attention of the Commons to a particular issue or campaign. Other MPs can show their support for a particular EDM by adding their signature to it. While they are not normally debated, an EDM that attracts hundreds of signatures from MPs of all parties is likely to result in some kind of response from the Government.
About Parliament - Early Day Motions
Early Day Motions Database