I don't know if this is just my Tesco, but they have reduced the Tru-free biscuits (the only Tru-Free products they carry, so may be more in other supermarkets) to 99p. They are normally £1.49. We get through a couple of packets of these a week, so that's quite a big saving.
Have purchased 6 packets of bourbons and 6 packets of custard creams (they wouldn't let me have any more under their bulk buy policy )