Folks

I'm fairly sure this question has been asked and answered previously, so apologies for being a slow learner, but one of the fleet is hitting the big 30 this year. In terms of the reduced road tax, is that available from the date at which it hits 30 years (August in the case of first UK reg, or April for first reg in Ireland) or is it available now that its in its 30th year?

Thanks in advance.