Unless I am mistaken, you won't be able to visit the H store in T5 and there is no H in T4. Arrival and departure routes are strictly segregated at LHR.
You should be able to go to the T5 location after you arrive in that terminal. There is another location in T3, and 3.5 hours MIGHT be enough time depending on how fast you shop at T5. To pull this off, however, you need to get a Heathrow personal shopper (who will escort you through security at T3). This is a free service at Heathrow, and you can set this up simply by emailing them. Good luck!
By the way, just from my own experiences, I have ever scored a L30, seen a Rose Sakura GP, got offered clutches and many more things at T5. Not a lot of tableware though.
My fd got offered at least 5 bags at T3 3 weeks ago (2 P18, 1 GP36 in leather, 1 GP30 in canvas, 1 GP 30 in leather, 1 herbag 31) all wrapped in plastics, the SA asked which one she liked most and she d bring it out as she wouldn't wanna unwrap the plastics unless she s sure about the bag. She took the P18 rouge Tomate in the end!
And they are consignment stores like a franchisee according to my SA in Sloane Street so they are very much separated from boutiques in London. That's why you don't really need to play the H game but being nice and polite would always be best! The rest just comes down to luck!
Enjoy shopping!
Thank you all for your comments and tips! So grateful to be part of this helpful community


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This is, as you may have guessed already, my very first shopping trip at LHR. As a matter of fact this will be the second time in my entire life that I have a layover in LHR! I normally fly direct or through other airports but this time I planned my trip through LHR for the sole purpose of Duty/ Tax free luxury shopping so it would be a real pity if I can't.
I didn't know that arrivals and departures at T5 were strictly segregated! Was happy to see that I was landing there and thought that would save me a lot of time. I wasn't planning to go to T3 with T5 having all the shops that I am interested in; Chanel, Hermès and
Gucci
I've already checked the LHR shopping site and sent 2 separate e-mails (one for Chanel and one for H) last week inquiring about duty free prices with a list of items I'm looking for but haven't received any answer yet. I haven't mentioned any flight dates or LHR rewards number so probably that's why they ignored me. I don't mind booking a personal shopper and meet the limit of 250 GBP, I bet a Chanel brooch is easily more than that, but I really wish to know the prices of the other items so I can do my math here and make calculated purchases. I first have to convert the price to € and see if it's worth the discount, otherwise I'm happy purchasing them at my home store if the difference is not that significant. I've compared the prices on both the Eu and UK sites and it seems that H prices are a bit higher on the UK site.
I'm particularly interested in:
Oran Sandals size 39 in gold/ black price: 475€-------> 445£
Hermes belt kit 32 size 80cm in etoupe + golden buckle "martelé" price : 650€ ------> 620£
CDC in black leather and phw price 995€ --------> 840£
Kelly Dog black with PHW price 490€ ------- >415£
Eventually a CSGM 140x140 from the Maharani collection 925€ ---->780£
Mosiac au 24 gold tarte plate 310€
Mosiac au 24 gold Breakfast set for two 390€
Also a Chanel sling back in nude/black
Chanel classic M/L in black caviar with SHW/GHW
A brooch
It's a long list and I will probably won't be able to purchase all of them at once, but I made my list as long as possible to maximize my chances of finding at least one thing.
I will def sign up for a LHR rewards number and resend my requests a couple of days before my trip and hope they will reply. I will also study the airport/terminal map to get to know the place. I will pack super light, one check in luggage and a hand bag/woc with a foldable Longchamp Le Pliage (I have the cabinet size one) so I can be light and "mobile". As you see this girl means business a.K.A shopping

.lol