A private beta for PlayStation Now begins this spring in the UK, Sony has announced.

PlayStation Now lets you stream PS3 games, such as Uncharted 2, on your PS4.

PlayStation Now is Sony's game streaming service. It lets you play PS3 games on PS4 using Gaikai's cloud gaming technology.

PlayStation Plus members will given the opportunity to "be among the first" to use PlayStation Now, but you have to register your interest on PlayStation.com.

Others can also register their interest to be involved in the later phases of the beta trial.

The closed beta is available to users in the UK on PS4 only, Sony said, and will be free of charge during the initial stage of the beta. Here's the small print:

Taking part in the PS Now private beta trial will initially be free of charge - however, at later stages of the trial we will be testing rental periods and pricing models, which will require payment.

When PS Now launches in the UK you'll be able to stream games at a "low rental cost", initially to PS4 then to other devices, including PS3, PS Vita and Sony Bravia TVs starting with model model KD-X9500B, KD-X9000B, KD-S9005B, KD-X8500B, KDL-W950B, KDL-W850B, KDL-W800B, KDL-W700B, KDL-W600B, KDL-W585B and Series onwards.

You need a DualShock 4 or DualShock 3 wireless controller and a broadband internet connection (minimum 5mbps recommended).

Here are the games available during the closed beta: