All Calling Features are separate add-ons, some chargeable some not, to your Line Rental and Call Plan contracts. BT are changing the charge for BT Privacy + Caller Display (not Caller Display alone which is already chargeable) from free to £1.75 pm from 4 Jan, unless you sign up for a new 12-month Line Rental contract.
It will depend on whether BT will allow those on LRS to sign up and. if so, how it will work. BT could easily say that those on LRS are not eligible, but haven't seen anything on BT.com to say either way, and they would be within their contractial rights.
Do your Calling Features, from
http://www.productsandservices.bt.com/consumerProduc... , contain an entry:.
o BT Privacy with Caller Display free for 12 months....................................................... £0.00
Includes the option to register for the Telephone Preference Scheme (TPS) to help prevent unwanted sales calls. A new 12 month line rental contract applies
If so, presumably that are allowing you but you need to speak to them to find out how it affects your LRS. If it is not there, presumably you are not eligible.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC