Just phoned the CDL helpline (0800 585 505)
Some key points to note,
HGV/PCV/HIAB/PLANT/ADR courses are covered by CDLs but the training provider must be CDL registered, they can register by calling, 0845 0000045.
80% of funding is covered or 100% if you’ve been out of work for 3 months or more. As previously stated you only start repaying the month after training has finished.
They are financed from 3 banks, but it appears that you must have a reasonable credit history, or you’ll be declined.
May be what your looking for to fund that initial training.