T-Mobile's 'Full Monty' tariff - the closest thing they had to rivalling Three's One Plan for big data users - now comes without inclusive tethering for new customers. To get tethering customers will now need to select a pay-monthly tariff with an 'Extra' (1.5GB) data allowance included or add it to SIM-only plans for £10 per month. Pre-pay customers are out of luck.
In usual form T-Mobile have declined to explain their reasoning despite making a lot of fuss about this at the time of launch just 6 months ago. With the loss of their best-in-class BlackBerry roaming offering earlier in the year, T-Mobile's data tariffs now less and less appealing.