I booked a hotel on lastminute.com and accidentally did 4 nights when I meant to do 5. Well actually what I did was I booked Eurostar for 5 nights when I meant to do 4, and Eurostar is not refundable or amendable, so the “best” thing to do was take an extra day of holiday. Doh.
Anyway, I asked lastminute what to do and they said to book the extra night as a separate order and they’d get the hotel to merge them.
This I did, and it ended up £4 cheaper than the 5 nights would have done to begin with.
Still, good going lastminute.com, thanks for being more helpful than Eurostar!