We can do it in 3/4 working days, if everything goes to plan.Looks like they're coming from China, so I'd doubt you'd see it within 4 weeks.
Order Recieved and picked day 0 in Guangzhou/Shenzhen
Delivered over the border and into HKG Airport day 1
Departs HKG evening day 1/early day 2 via cathy/direct flight
Arrives LHR Day 2/3
Customs cleared (B2C), recovered, broken down and injected into final mile provider evening day 2/3
If next day deliver is selected (UK Mainland), deliver is day 3/4 days thru to end user