These questions have been answered before. . .but I am at my wits-end with the Google Search. . .

I am booked IAD-LHR in a full Y ticket and upgraded into NC. If I remember correctly, I will not receive an arrivals lounge invitation upon arrival at LHR. Please correct me if I am wrong.

Upon arrival at LHR, are there any options for getting a shower? I am connecting on to BMI to Dublin, will BMI offer a *G any shower facilities there?

thanks!