Britain’s smallest network operator Three UK announced it will be ending its 10-year relationship with Carphone Warehouse as of next month and will only be selling its mobile phone deals online and in Three UK’s shops.

Carphone Warehouse said that it would no longer sell or upgrade Three offers through its channels from early December.

Three, owned by Hutchison Whampoa, has 348 of its own British stores and also pulled out of another deal to offer its contracts through retailer Phones4U.