actually, to update my view of just two days ago, Labour have imploded over defence - all on their own and with no help from anyone.
the tories may now not see the need to add to the conflagration with announcements on MPA etc... perhaps they'll feel that they should keep such things is reserve, just in case Labour somehow manages to plaster over the schisam thats developed over defence policy/posture when they can helpfully be used to re-ingnite Labours civil war...