Well an update on my progress with Specialized, but to answer a couple of questions first, Yes I am the original purchaser/owner, no it hasn’t been hit by a rock or abused in any way, I bought the bike late July 2009 and noticed the crack at the end of August 2014 so yes although a matter of days it is outside of the 5 year window.
Gutted as I don’t ride my bike hard and look after it to an outstanding condition.
I emailed Specialized last night with a more than polite and humble approach and got a reply today saying that they would sell me a chainstay for £200 or give me 20% off of a new bike if they took my bike as part of the deal, this doesn’t fill me with glee as lets say my Stumpjumper is worth £900 (it is in MINT Condition and looks almost new) with a new chainstay so equivalent value before replacement £700, if I were to buy the new 2015 Specialized Enduro 650b (that I have my eye on) which cost £2,600 with their offer of 20% it would take £520 off of the price meaning in real terms my bike gets £520 !!
Still really annoyed and not finished yet (I fear Specialized are though)
Thanks to everyone with positive comments