The Nokia Lumia 720 (http://www.gsmarena.com/nokia_lumia_720-5321.php) and Lumia 520 (http://www.gsmarena.com/nokia_lumia_520-5322.php) got their announcement (http://www.gsmarena.com/nokia_announces_lumia_720_and_520_for_nonlte_markets-news-5605.php) at the MWC only a couple of days ago, but you can already buy them in the UK.
The superior of the two - Nokia Lumia 720 - can be pre-ordered for