We use DPD for UK deliveries.
International couriers vary depending on location and requirement, however UPS is often used.
The following UK DPD delivery services are available:
DPD Weekday Courier by 10:30am
DPD Weekday Courier by 12:00pm
DPD Weekday Courier (free on all orders over £25)
DPD Saturday Courier
DPD's delivery hours vary depending on your area and address type, although as a general rule they may deliver to business addresses until 6pm and residential addresses until 10pm.
UPDATE: From 23/11/20 to 11/01/21 DPD will be withdrawing PRE 10:30am and PRE 12pm deliveries.
Weekday courier and Saturday courier will still be available.