The M4 Relief Road, still being considered at a public inquiry, is expected to cost more than £1.4bn once VAT is taken into account, a senior Welsh Government official has told AMs.  Simon Jones said it was not yet clear what VAT would need to be paid.  Welsh Government recently announced it had committed to spending an extra £135m to improve Newport Docks – pushing costs up 10% to £1.3bn.  Labour Llanelli AM Lee Waters (once with Sustrans) feared costs could rise to as much as £1.5bn.