worth shopping around . . . . . . . . .
Can only speak for my own practice - Initial JAR class 2 SPL medical (which, of course, includes ECG at 45 ) - here is £ 160.
There are very wide variations, and obviously will depend on how far you are willing to travel.
One other point, many of the smaller practices will NOT have to add VAT.
The dreaded tax has to be added here, so the total ends up at £ 188.