Regional assemblies are the obvious answer to the West Lothian question.  They would address an imbalance in our current constitutional arrangements.  They would help to promote regional identities and to exploit the different economic strengths of our regions.

The decision to have regional assemblies (or not) is far too important to have been left to a single region's referendum/popularity contest/mid-term mood poll.  

Let's get on with it.  It shouldn't take a large budget. The assemblies won't have to have dramatic new powers.  Taking a strategic overview of transport and congestion would be a good function to start with.

By the way, an English parliament is not supported.  That wouldn't address people's desire to have a regional voice.  Scotland and Wales are about the right size (geographically and administratively) to support the regional tier of government, as well as rightly being proud nations within the UK.