I would also be concerned about presentation. Turbines are fast-movers which is not good and you'd need to be able to fly it precisely AND keep the speed down AND stay n the box. Flown at speed the manuevers would be rushed and turbine lag will make getting thrust on and off at the right points very difficult.

If you don't have anything else I guess it's OK assuming UK rules allow any airframe in the lowest class but I think that you'd be much better off with a Focus or other pattern type plane.