Ford KA engine misfiring/juddering- any ideas as to the cause??

hi i have a Y reg Ford KA Collection.

recently it has started misfiring and juddering, especially when setting off in lower gears, the engine is also really noisy and loud. it seems to struggle to get going and then all of a sudden, it kicks in and moves off fine. it wasnt too bad to begin with but the juddering and spluttering is getting worse the more i drive it. when i first get in it, in the morning it isnt too bad but the longer the journey, the worse it gets. i dont know if its an engine or exhaust problem. or if its struggling to get petrol through to the engine. as sometimes when i get out theres a strong smell of petrol. its really bad at juddering when going up hills and when putting more foot pressure on the accelerator. ive tried looking under the bonnet but im no mechanic being a girl! there seems to be some bubbling around the engine which looks like leaking oil but i cant be sure. im going to take it to a garage after the bank holiday but in the meantime I just wondered if anyone had an idea of whats wrong with it? is it worth repairing or is it likely to be expensive? as car only cost me £850.

also can anyone recommend any garages near Eckington? Thanks

it could be a faulty coil pack. they arnt to expensive to replace.

ye as jon smith said sounds like the coil pack

From recent experience, certainly worth checking out the coil pack for about £27. It's an easy DIY job for anyone with the correct TORX driver bit, just make sure they change the plug leads at the same time.

A duff lead can take out the new coil pack

Good luck