In reply to Steph-in-the-West:
The changes appear to mean that, if you choose private legal representation, your costs will not be refunded. From the link that NickB posted:
"Your clients appearing in the Crown Court, in respect of proceedings commenced on or after the 1 October 2012, will not be entitled to recover their legal costs expended in successfully defending those proceedings if they chose to be represented privately.
The rationale for this policy position is that
all defendants in the Crown Court will be entitled to legal aid whatever their means, but subject to a contribution.
It has to be remembered, however, that your clients who obtain legal aid will be entitled on acquittal to have the entirety of their contributions repaid to them. This is in contrast to those who chose to pay you privately for the cost of their defence, and who will not be entitled to recover their costs."