Don't bother searching - just look at the top of the forum for the FAQ. It is covered in here:
http://www.flyertalk.com/forum/bmi-d...e-lounges.html
In summary, bmi unfortunately withdrew their US services earlier this year. MAN-ORD ended in January and MAN-LAS ended in April. They then reallocated the two A330s to the LHR-TLV and LHR-CAI.
Hope this helps.