Managed to purchase one of these
http://www.ebay.co.uk/itm/Lezyne-Mac...item4d154f1778
for the grand price of £35 posted - I also checked and it IS the 2014 unit which has a 'boost' to 350 lumens (at a rated 2 hours) - not bad for such a small and light unit.
I know the rear to be good - but the front looks impressive giving a good spread and lots of brightness (albeit in the house) but will be sure to let you all know how it goes on the road - Looks like a handy unit.