I've moved this out of Voda as it is an mvno. No matter if they piggyback on Voda towers in the UK.
My research says NO. Lebara UK is only H+ for now...
Lebara Mobile Coverage Checker - Mobile Phone Network Signal Coverage Reception for the UK Lebara Mobile 2G, 3G, & Mobile Broadband + a couple other sources. On source indicates they backed out of offering 4G in summer 2014.