The DIN went live either late yesterday or early today, so yep, now all official.
No new medal just a re-working of the criteria for the original LS&GCs. Backdated to Jun 2014 to tie in with the date of when the Holmes Review was accepted by HMG / MOD.
Interestingly, Reserve service doesn't count towards it at all, so if you left the Regulars with 13 years under your belt, and went straight to the Reserves for 5 years, despite 18 years under the Colours, you wouldn't qualify for the LS&GC but it would go towards whatever the Reserves long service medal is.