I think this is the main change, and hence the updated form:-
IMPORTANT: The Knowledge of Language and Life in the UK (KOLL) requirement is changing on 28 October 2013. From this date, applicants will be required to:
• pass the Life in the UK test; AND
• have a speaking and listening qualification in English at B1 CEFR or higher, or an equivalent level qualification.
Further details can be found on our website.
If you have an approved ESOL then this doesn't matter