Hi guys, took my snake to the vet today and she basically said the reason why it is coming out with the red rings is because as you guys have said she has not been shedding properly with previous owner and because my husbandry is correct she is now shedding properly which is allowing blood flow to the tail, so basically i am to carry on with what im doing and see how it looks on the next shed, worse case he may need the very end cut off but she thinks it may be ok now she is in the correct environment.
He was in a vivarium with previous owner so probably very dry.
Anyway positive outcome sounds like.
Thanks for your help and i will let you know how he looks after next shed.
Cheers.