This is a user community (albeit monitored by Sonos staff) so we can’t help you with this question. Try asking their sales department? 

If you order from https://www.smarthomesounds.co.uk/?utm_source=google&utm_medium=google_map_listing&utm_campaign=map_link&utm_content=Website%20URL

you will get it next day they offer good deals and great service 

Since you are in the UK, I’m not sure if SONOS can pin down exactly when units shipped from the EU will arrive. Packages can be stuck in customs for a day or two. As suggested, ordering from a UK dealer will yield the most predictable delivery times.

From previous purchases, it has taken 2-3 days for delivery, so I would say Thu/Fri.

I have had terrible delivery times in the UK, not even newly released or out of stock taking weeks to arrive. I now just buy from an authorised Sonos dealer / distributor based in Twickenham and always get items next day via DPD.

Thanks for the pointer I will look at them. Had preferred a direct Sonos order due to an upgrade discount

I’m in the UK. Same as @Mr. T, it often takes around three days for Sonos purchases, but I guess the holiday season purchases are about to begin, so maybe get in quick.