Not really. As I explained in another post. The UK is not the US. Representing yourself has never really been a thing in the UK. Legal proceedings are beyond complex. They're full of fail safes and balance checks. If you don't understand them, you're walking straight into tens of other charges resulting from your own ineptitude. Not to mention an almost dead certain path to incriminating yourself whether you're guilty or not.

You still have the right to do it. You always have in the UK and legally you always must, else you don't live in a free society. However doing so is beyond the realm of stupidity. You still have the right to defend yourself in the UK and because of that you will still be able to cross examine any witnesses or defendants in person. However by the time you get to that point it's almost certain you will have already done or said something that would lead to alternative charges.