PlayStation Plus is now a required service for online play on PS4, so do yourself a favour and pick up a year's supply of multiplayer goodness for £2 from Rakuten. You'll need to use the voucher code JANOFFER10 to get it at this price, and you'll need to set up an account if you don't already have one as you can't you the voucher if you try to check out as a guest.
You'll definitely want an account, mind. Rakuten codes pop up all the time and can help save you some serious money! Cheers Jakirrr21.