Thanks again for your reply.
Just tested with SkyLighting diabled, and yes it was that causing the shadow issue. I have however made an odd discovery - the shadow issue only happens when facing East, South East, South, and South West - i cannot replicate the issue when facing North West, North and North East (approx), not sure if that info helps at all...
Good news, i tried disabling the mod (Shift+12) as you said, and sure enough the same thing happens with light sources - so its not your mod

. Also the picture with the missing torch particles is misleading, there is no issue with missing torch particles in-game...
Thanks for your help - i appreciate it
Ps. If i have any suggestions for enb features ect, where should i post them?