If you're holding *G status, you might *try* to get into the SEN lounge. On another thread I have read that you might sometimes be lucky and be allowed to use it as an arrival lounge (but no guarantees).
When you're arriving at a finger position you'll walk straight past the lounge entrance (one level above the concourse on the left hand side), if you are arriving by bus you'll be most likely dropped off in concourse B. Follow the signs for connecting flights towards the A concourse, then turn left and follow the signs toward the lounges.