HTC Hero :: Gmail Auto Sync Fault?

T-Mobile UK user here. I've searched through this forum but can't seem to find anyone else reporting this.I've had a G2 for approx 3 weeks now, however, the thing just won't sync Gmail as it should - either via Auto-sync or by manually trying. I've had a G1 for the last 12 months so feel experienced enough to know when something's not quite right. I am using the G2 in exactly the same locations as the G1 so it cannot be a reception issue. I've tried sending test emails from my work email address to my Gmail account: Out of the 10 test emails sent over the space of 8 hours, only 2 came through (the G2 was on Auto-Sync the whole time). The others eventually came through via a combination of manually instigating Sync (1 success) or, in most cases, having to switch the phone off and on - even this only worked twice. Whenever I sent emails from work to G1 they would appear on the phone instantly. There isn't a prob with the emails leaving my work domain as I can see that they have all been delivered successfully viewing my Gmail account over the web. If I leave the phone on the Data Synchronization screen, the round sync indicator is constantly running next to "Google Mail" and intermittantly pauses with the error message that "Sync is currently experiencing problems. It will be back shorlty". have also found that the reception doesn't appear to be as good as the G1 - I work in central London and live 10 miles south of the river.I'm running FW 1.5 Kernal 2.6.27-a5504199 Software 1.0.0.A6288