I use the TP Link Deco E4 three node system which works well for all my IP cameras, including a couple of bird box ones. This is configured in access point mode.
You can also set up a separate guest 2.4GHz only network which seems to suit many devices better. Just remember to allow local access.
A two node E4 costs about £49, one of which needs to be connected via Ethernet to the home hub. I am using a Home Hub 4 (ADSL), with its wireless turned off.
I have three of the black mini-discs from BT as part of my Halo 3+ ; no additional fee is payable.