I flew IAH-LGW the other day, asked the grey-coat in IAH if I could access the Emirates lounge upon arrival and she said no. ?? I didn't take the time to go try it anyway, but should I have gotten in?

I'm a Plat on an intl itin, a PC member, a BF customer - will I be able to get into the Emirates lounge on the return LGW-IAH?

Thanks guys...