That is very disappointing news.
Thank you for having flagged this up to forum members, Mobileman.
There seems to be some confusion about this, however: I have just seen on the Three blog that the
One Plan Sim Only will still offer unlimited tethering.
http://blog.three.co.uk/2014/03/18/three-make-0800-numbers-free-on-new-pay-monthly-plans/A few more changes in the new plans: in addition to 'free' 0800 / 0500 calls, some plans also appear to be offering "All-you-can-eat" minutes and "all-you-can-eat" texts (commercial response to Vodafone Red?) I hope to get some clarification today as to whether those descriptions truly reflect what will be available to Three customers...so far, I have not been able to find any mention of any FUPs.
Free Three to Three minutes no longer seem to be included in any of the new plans.