Not legal without a defence, unfortunately. Those two guns are also naff - as people have said in that other thread: Avoid those kinds of rubbish websites that exclusively sell 2-tone guns as there are plenty of decent retailers how will spray a decent gun for you.That said, however, you should certainly rent your gear and get your UKARA sorted or become a site member and then buy something decent. There's no hurry to start spending, but I know it's tempting. You will regret buying cheap when you start just because you couldn't be patient (this happens all the time to new players).
And please read the stickies in this forum as you'd probably have found the answer without the need for a new thread. http://www.airsoft-forums.co.uk/index.php/topic/3779-the-beginners-guide-to-airsoft/
http://www.airsoft-forums.co.uk/index.php/topic/12854-new-player-guides-info/