Hey Clive

Thank you very much for that, that is a great help, I haven't made a power supply like this before so I'm not sure if these create much heat when in use. The space will be a little limited so the components will be quite close to each other and planning to put the incoming MCB for the power supply Horizontally above the toroidal doughnut the plan is roughly to keep it a similar size to a PC power supply in height but in a longer package.

thank you very much.