It's the Teak Wood 6 seater tabel advertised for 1k (including some
chairs) - it's not actualy part of the Winchester range - but the table
has a brass name plate with "Winchester" on it.
I'm pretty certain that it's teak.

After doing some research, I'm not worried about how the teak was
sourced as most teak used these days seems to come from various managed
plantations. I'm sure Homebase wouldnt use a supplier with an illegal
source.