Apparently the charges were laid this morning, they converted the court into a magistrates court to charge him, and then back into a crown court to sentence him.
I'm not sure if the reason for the abduction charge relates to the original extradition, because that was the grounds for extradition, and maybe they had to go with that or be breaching their extradition treaty. Obviously they knew about the sexual activity for months, so it must have been planned that they would spring this charge as soon as the original trial was over.
I'm not sure if he/his lawyers were aware though, it seems a little dubious if they weren't.