You have the same problem as me.I'm going to get mine sorted in a minute.Tyre HQ or Kwik Fit?I paid almost £20 a month ago and now i have another one in a different tyre
Do the French thing, get a short nail, and a load of fast setting glue (like hard as nails or something) and cake the nail in glue and ram it in the leak with a hammer.... Voila - fixed
If you've got a monster tyre which is expensive - then try shopping around at places like this:
But if you don't and you have a standard small tyre - then Quik Fit and Halfords will only be a few pounds different so for the hassle its easier to go there...