BT telephone and broadband package

Question

Hello, 
I am currently paying telephone line rental to BT (Line Rental Saver) and have a Carrier Pre Select (CPS) service (Sky Talk Unlimited) on my line. My current broadband provider is O2 ADSL Standard (legacy). 
I was thinking of switching all my services over to one provider and being as though i am a Sky tv customer also, this provider was the favoured choice. Now, i placed an order over the last weekend for services Totaling: £37.25 p/m  (All 12 month contract)
On Wednesday 11th July i received a call from BT stating that they had been contacted by a different provider, Sky, informing them of my choice to switch my services over. BT also offered me a "deal" for being a loyal customer and said that the offer was valid anytime before my earliest estimated activation date with Sky as my line is still with BT, until Sky takes over. 
BT offered: 
Line Rental Saver             £10.75 p/m
Infinity 2 Unltd (80/20)     £17.25 p/m  
Anytime Calls Unltd           £4.90 p/m
International Freedom       £5.20 p/m
Total: £38.10 p/m  (All 12 month other than Infinity 18month contract)
I also thought about continuing to pay my line rental to BT (LRS), keeping the Sky Talk Unltd CPS, and subscribing to Infinity 2. However, i also want the Home Privacy Service with Caller ID on my line. From my understanding i must make 2 chargeable calls on the BT network to avoid incurring further costs but BT have cunningly made the use of 1280 redundant therefore further costs are incurred.
For the Line Rental Saver; 2 chargeable calls are to be made to avoid a cost of £1.50 p/m and for the Home privacy service with caller ID the same number of calls are to be made to avoid a cost of £2.70 p/m. 
So for my mixed BT+Sky bundle i would pay £37.20 p/m (Infinity 18 month contract) 
Now, i would like to ask which would be the best option because from my point of view all 3 packages satisfy the requirements of my household and i cant think of any shortcomings other than the fact that BT anytime calls includes 0870 numbers (1000 mins) and i am aware that NOT all 0870 numbers are equal? Also BT are offering a faster fibre product albeit subject to throttling.
Moreover, have read about 0844 numbers being charged at different rates depending on the type of "code" stated in the T&C but do not make many calls if any to these prefixes, perhaps one or two IF required.
I have read that BT do throttle P2P heavily which is often used in my household by the children (i try to educate them on this issue) and Sky's fibre service truly is unlimited without throttling. If anyone has a moment or two to possibly comment on any disadvantages which i may have left out, or perhaps something which i have missed then please do, otherwise i am uncertain as to which package to go for :-s (slightly weighted towards the BT+Sky bundle).
Kind Regards.

Answer 1

just worth noting that sky use the same OPENREACH Infrastructure as BT and all other providers offering fibre products it was also Sky that stopped users using the 1280 prefix so it would cost them more to remain with BT
not BT that stopped the use
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