Thanks for taking the time to reply.
I have a couple of questions regarding the information you have wrote.

Where would I get a sacro-iliac joint non stretch 50mm belt from? What if the problem wasnt SIJD related, would it do any harm wearing one?

Whats the purpose of the fish oil capsules? Is it for their lubricant properties or the omega 3 benefits?

With reference to the orthotics, Ive been wearing my orthotics for 3 weeks now gradually introducing them to my daily activities and I have an appointment with podiatrist next week to see how Im adapting to them. What I will say is the left arch FEELS higher than the right foot. What i mean is when Im standing or walking I can feel it in my left foot more than I can feel the right orthotic?? Ive looked at them closely and they are identical in height and shape. When wearing the orthotics for about 4 hours the left arch then will start to ache slightly and its nice to take it off.... What do you think? ALSO The podiatrist has put a heel lift on the RIGHT orthotic. 3mm I think.

The reason I went to see a podiatrist was because when I do some running on the treadmill I was getting a sharp nerve trapped pain in the right foot after about 10 mins and if I tried to run through it then it would stop me running put it that way.... (not a pain, - a nerve trapped.) This has happened 3 times over the last 6 months, and I only ran the 3 times... YET I used to run every night on the treadmill about 2 years ago without a problem.. It is also quite apparent I have fallen arches as I managed to get my hands on several old pairs of footwear and they were all worn out where the ball of the foot is. She also said I have no range of movement with my big toes,. (I also get severe shin splints after doing alot of walking)

What type of exercises would Increase the lateralis abdominus muscles. I was thinking peliv tilts and planks?
Im also struggling to find stretching excersises for piriformis you mention,. Do you have a link?

I was also reminded today of a sharp spasm I sometimes get in and around my right hip joint. Its a quick spasm that makes that leg feel momentarily weak. e.g (if I was to miss the last couple of steps when walking downstairs and land on the right leg it could possibly SLIGHTLY giveway from the hip outwards)

I have light brown hair - I presume you mean ginger when you say red?

Glad to here swimming shouldnt be a problem if I strengthen my core and abs and stretch the Erector spinae.

Cycling is another issue I have... Its that arched posistion - when I get off the bike its like the middle of the night when it takes me a short while to stand up.

SO if you manage to answer any of the above that would be great. Especially about the belt and orthotics. For now Ill wait and see what the x-rays show, Ive no doubt they will show something and then Ill get reffered to either a Hospital Doctor or a physiotherapist (NHS) see what happens...

So Il think plenty of stretching the Erector |Spinae is in order for the night?

Thanks again....