Further to
@IanSmithCSE 's response. Although I have Landline broadband for the house, I do also have a wireless set up, similar to he describes.
We use it when travelling in our motorhome, to provide 24/7 Internet Connection, just like at home. For Motorhome/Caravn usage, there are some considerations reference use outside go UK, but, I will ignore those, since we are talking about in UK use here.
We have a router (supplied "free" by 3), which allows unto 10 devices to attach wirelessly simultaneously. There are also a couple of Wired ports, if required. For £20/month, we get unlimited data, plus, GoBinge, which allows streaming from Netflix (and other sources) without impacting data allowance.
I have not measured the speed, but, it is a 4g connection, and we have no problem streaming TV, Video etc.
Similar packages are available from other Networks, in particular Vodaphone.