From EC news this month:

https://www.britishairways.com/trave...club/_gf/en_gb

This is a VERY good offer for anyone travelling to the US and can stay in some of the budget properties in the Hyatt group (Hyatt Place, Summerfield Suites). Admittedly its tough if you are only travelling in Europe (UK is Birmingham - FANTASTIC place - and London) but you still have until the end of July to get the stays done.

Anyone coming to London could probably switch between the Andaz and the main Hyatt each night, assuming Andaz counts.