Go for the finance Honda 5 offer and cancel after 6 mths, not cash.
That is initial £500 off, plus 5yrs servicing and extended warranty that is worth maybe £1000 c/w most other cars.
Summer offers were about £1000 more disc, which they'll get some back with mats, flaps (don't try to self fit) and other packs.
Drought of other new cars prob have killed the dealer disc. But your 8yr old Jazz is prob worth £1000 more than start of the year so all in all the same.