This might be a mistake from Charles Tyrwhitt but for now it worked for me -
Spend $75 or more and get a free polo shirt valued at $70 with code LSPOLO until the 22nd of August 2016.
This offer applies to seven polos and if you add any of these to your cart with an item from the accessories category (cufflinks for $10, socks for $12, etc) you'll actually get the polo shirt for free (as your order would be over $75 including the polo).
Unfortunately you'll have to pay an extra $12.95 for delivery, which turns out to be more than what you're effectively paying for the stuff you buy - $0 for the polo and $10 for the cufflinks...
But still it's better than paying $75+ to get the free polo shirt as shipping would still apply.
Models in this promotion are: JEP0017NAV, JEP0017IDG, JEP0017IDG, JEP0017WNE, JEP0150IWT, JEP0150NBE, JEP0150BSK, and JEP0295UGY.
Offer is not valid in conjunction with any other vouchers or special offers. FYI - The discount code is supposed to work on clearance items, but it didn't for me.