Our LA used this too - majority of TAs signed their new contracts - most actually gained money, though not as much as they should have done! Those of us who didn't sign were deemed to have accepted the new contracts by dint of continuing to work after the 90 days redundancy notice. Best advice is for you all to join a union asap! If you have any worries about future redundancy (not to mention the other horrendous situations which can arise for those who work in schools) union membership is essential. Official representatives of school support staff are GMB, Unison and (less popular) Unite - please join one of these very soon for your own protection.