Google Chromecasts (Cricket Road OX4)

Two Google Chromecasts. They plug into an HDMI socket and make a dumb TV a little smarter. They need USB power (not included, but cables are; most TVs have a USB socket or two on the back which would do fine). Once set up, you can cast iPlayer, Netflix, YouTube etc from a phone or tablet to the telly - setup is easier with Android phones than Apple, but once done, you can cast from iPhones too. Each one is about the size of a Jaffa cake.

I think one is 1st generation and one is second, but they both do up to 1080p I think. Setup instructions are readily googleable.

(One now promised, one still available.)