No it is not possible.
You can use the 2 boxes on the same TV if you have a spare HDMI port. If not you can buy an HDMI splitter quite cheaply and you will need a separate aerial feed to both. Again this can be done with an aerial splitter and leads. The latter can be purchased from local supermarkets or electrical stalls on markets. The HDMI splitter from internet shopping sites.
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
