Hi 'BIG COL' spending £130 on trainers does not automatically make them decent. You should consider having your running technique assessed on the treadmill whilst wearing your current trainers to see how you place your foot on impact with the surface and to see if they offer adequate support.
? If you excessively pronate you may need orthotic review ? they may offer you insole to correct the alignment of your feet when running. Also you need to look @ the life of your trainers as they tend to have around 400-500 miles in them, or 6 months, this includes shelf life I kid you not and a good running shop will tell you this!
We have a few running shops which offer this service, also if your a member of a gym see if their physio will watch your technique on the treadmill, and offer any advice.
Shin splints are horrid, caused by inflammation on the soft tissue around the front part of the tibia (shin) but some people miss diagnois themselves as having shin splints when they actually have stress fratures, pain for this is generally located under the knee. Go see your G.P if your unsure or a local NHS drop in center as they have physios working in them.
The best treatment is rest! you can keep your fitness up by swimming and or cycling, avoid excessive impact, you will only aggrivate the injury.
Ice therapy for 20 mins 3x daily with massage.
Anti inflammatory medication and look into purchasing a shin splint wrap, still not 100% convinced but the patients that i've known use them like them as they work by applying pressure to the soft tissue and away from the calf, also can help relieve pain...
Hope I haven't babbled on too much here, good luck
Kelly : )