Hope after they take your money they at least use the proper equipment to make sure it is safe or else you may be going back soon for a new engine
£65 for a Bleed valve, wow erm is this Dick Turpin racing by another name. Not to mention the £100 to fit 4 wires to the ECU and a Bleed Valve. So 300 sheets to make the car quicker, without checking the car is not Detting its nuts off or running lean.
I would go for a ScoobyECU which costs about 150 and adjusts the fuelling and timing to UK spec. This chip allows the car to run more power safely on UK fuel