The disclosure on Nissan's official UK Leaf Facebook reads like this:
Additionally, the UK Nissan Leaf reservation site has been updated to reflect the price increase with this disclaimer notifying potential buyers:There are several key reasons why the cost of the Leaf has had to be increased. Firstly, an increase in the cost of Raw materials - there has been significant inflation in the cost of raw materials which has meant that most Nissan models will be included in this price increase (maximum of any other model is 1.8%). Also exchange rate fluctuations has played a part on the price increase.
So, UK Leaf intenders, the message seems to be to order now for the best priceReserve your Nissan Leaf now with a fully refundable deposit of just £257 ($416 U.S.). Price change effective March 1st. Existing orders will keep current price. Pre-orders placed before March 1st will attract current price. All orders placed after March 1st will be subject to price increase.
[Source: Nissan UK, Leaf Talk via All Cars Electric]