[Zebster]

If you do somehow gut the DPF, then you would also need to modify the ECU software to avoid warning lights and messages relating to the out-of-range sensor readings that will be caused. There are plenty of companies who will do this for you.

However the MOT test was modifed last May specifically to improve the detection of DPF removal... while it is reported that vehicles modified in this way can still pass if the exhaust still appears to be clean, this is likely to be tightened up as particulate monitoring equipment becomes more widely available.

Removal of a DPF is not illegal, however subsequently driving that vehicle on the roads is an offence.