If you are experienced you won't enjoy the Velotech bronze, the first level, it will be too easy for you.
I went for a bronze/silver combined (it was the only option at the time), 2 full days 9.30 to 4.30. Cost me 100 plus 200 ILA founds.
Managed to pass the bronze, but it was intense for me: as it is not something you can go home and practise from one day to the next, really to pass you should already be proficient.
I did a few free courses too, from bike shops and local, council founded, cycling hubs. Found this easier as I could go home, think about it, have a tinker.
Of course if a paper qualification is important, you need to start from the obvious bits.
Ah, afaik on the Velotech one only works on hybrids/mbikes, never road bikes, somebody who did the Gold told me.