Improve roads -- UK roads are the laughing stock of the developed world. Our roads just can't cope.
Improve all public transport -- we want to go green but for anybody outside London relying on public transport to get to work is suicide. It's late, overcrowded, expensive, slow... Did I say it's always LATE? the railways need major investment and we need more trams on super busy roots.
In summary, our infrastructure needs major, major investment and I can't believe they're spending £32bn on something that will generally benefit the wealthy few (despite being paid for by all). It's ludicrous. Oh and HS1 has been a relative failure.