OK, firstly, they all look legal, so no real worry regaring the law, nor the MoT - though you may get an advisory.
Some pics of the full width of the tyre would be good, then I can see the wear across the entire tread width. However, the Dunlop SportMaxx are well known to suffer from static deformation, which basically means the tyre can't actually support the weight of the car correctly. If you increase the rear tyre pressures by say 3psi and the fronts by 6psi, it should help negate this problem.