2% off hotel bookings at Alpha Rooms (not much but better than nowt)
Not going to post as a voucher or deal as it's not really either, but thought it worth sharing as even though 2% isn't a lot it's better than nowt.
If you're planning to book through Alpha Rooms (I have several times for cheap holiday hotels in Spain etc and had no problems) then go through your whole booking, entering your details and genuine email address, as though you're going to the end, but when you get to the payment screen, instead of paying and completing the order, just close the browser.
Sometime within the next 24 hours you'll get an email from them saying 'Did you experience a problem with your booking?' which will have a vouchercode for 2% off your next order at the bottom of it.
Not guaranteeing this method, but I've done it twice (first time by accident - realised I didn't have my bank card when I got to the payment screen), used a different email both times, and both times been sent exactly the same voucher.
The 2% says it's off your next booking, but when I used it the discount only came off the hotel part, not transfers. Not sure about flights or other extras.
Edit... in fact, I've just realised that it's the same code they sent me both times! So rather than person specific, it's just one per month RE_MAT2PC. Will also post as a voucher for now, perhaps it updates each month.