Topcashback.co.uk is currently offering some very competitive cashback rates on Hilton stays, as follows: All Hotel Bookings unless specified below: 8.4% America Booking: 6.3% Middle East (bar UAE) and Africa Booking:12.6% UAE Booking: 10.5% Bear in mind that bookings through topcashback are of course "direct" bookings, so you get status, HHonors points etc. Plus sign up via a referral link and you will earn a bonus £5 Amazon voucher when you have earned £10 in cashback.
...and if you convert your first £50 of savings into Tesco clubcard vouchers, you will earn a comparatively high number of Avios.
Yes - converting to Avios through Tesco Clubcard (£2.50 = 600 Avios) is way better than doing the direct Avios conversion (£2.50 = 262 Avios) which many make the mistake of on TCB