Well they are not extensions are they (at least as reported).
Like the Shrewsburys and the peak extras they will use the nn33 paths out of Euston.
I think ORR could turn Virgin down even if NR was happy, but not the other way round.
Unless the paths change (possible), or VT accepts a lower PPM (unlikely) I should think NR effectively has a veto.
Forgetting NR, I think Shrewsbury is more likely to be approved by ORR because there is no other application.
Blackpool also has the Alliance bid (although they have no trains) and judging how to handle the competition issues might cause a lot of trouble, as with GC on the ECML.
My guess was that if VT got approval it would only be until the next WCML timetable rewrite (2015/16?).
Edit 1:
Application detail and correspondence is now on the ORR web site:
http://www.rail-reg.gov.uk/server/show/nav.1258
Edit 2:
Fascinating.
The ORR material consists of the original application and the consultation responses from everybody except, crucially, Network Rail.
There is no pronouncement one way or the other from ORR.
The application is on an Open Access basis (not part of a service specification).
It is written to expire with the initial VT franchise extension date of November 2014 (so only covering 11 months of operation).
The text in the application is:
Alliance Rail take a dim view of it all, and complain that despite being Open Access, VT are using franchise (public) assets.
This was what torpedoed the ATW OA proposal for Aberystwyth-Marylebone.
They also objected to the Shrewsbury service as it proves there is spare capacity on the WCML which they were not allowed access to.
Apparently VT said they were using the Stafford route because the Birmingham route is "congested", but Alliance maintain it is not (and would not object to Salop if routed via Brum).
They also object to the fact that this is a last-minute application and never figured in the WCML capacity reviews (ESG).
Nevertheless, they seem to be prepared to let it go up to the Nov 2014 date (as they have no trains anyway).
But they do go on to reiterate their plan to order bi-mode EPS-capable stock for their services, given WCML paths.
None of the other interested parties objected (except evidently NR), but VT forgot to inform many of them and there are complaints of poor consultation, including from DfT.