I'm finding more and more so called UK suppliers are actually just a front for some one selling in the Far East? Where I'm never certain but usually look at the Trading details at the foot of the sellers page.
If I'm suspicious I send a message and check the response time and English. If the response comes during UK working time and is generally 'normal' English then I'll proceed, response during our nighttime or odd language and I'll look elsewhere.
I'm trying to avoid buying from China where possible but ultimately thats difficult hence my caution.