Swapped over the Veccy's standard air filter for a K&N one. While the filter was out I removed the 'extra' plastic bit inside the air box.
Fired the car up and she runs so much more smoothly, this was evident even on just tick over. Took her out for a gentle drive and found that she responds to the throttle much better now, not jerky at all at slow speeds. Then was the real test.....took it out for a proper drive out along the countryside. OMG ... such a change in attitude from the engine. Quicker to throttle response and rev's much more freely now.
Just for around £45 you too can have a better performing and responding car!!!
Bought mine from YB Filters on eBay...cheapest I could fine and very good service.