Samsungs don't update OTA. You have to download Samsung's program, connect it to your PC and it auto-updates. There's a 2.1 update since early 2010 for it. 2.2 (at least unofficial version) is coming soon. Maybe branded UK versions act somehow differently because we don't have these here.
Ah thanks, i'll try that later. Apparently the update came out mid march, I think he's had his longer than that so that explains why the one he got from T-Mobile was 1.5 and not the 2.1 version they now send out.
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Should have listened to you earlier.