Thanks for the replies guys, really appreciate it, I will buy the tool from totally alfa, I tried to tension the belt last nite using the ' wire method' on this forum, I got the belt tensioned but the pointer was still shy of the line up hole sitting higher and therefore not tensioned fully.
I loosened the tensioner bolt to try to increase tension using a screwdriver but ultimately lost tension again and I'm a little worried the belt isn't quite tight enough
I think using the correct tool I will be able to keep the tension whilst locking the tensioner bolt and securing the tension correctly , I have the correct tool for the balance belt tensioning as this came with the kit.
Will keep you posted how I get on, can't wit to get the car on the road, fitting new drive shaft gaiters, brake discs and pads etc to leave the car set up for hopefully a good summer.
Thanks again for all the advice.