I will be flying IAD-LHR on UA, overnighting in LHR, and then flying LHR-FRA-TLV the next morning. IAD-LHR-FRA are on one ticket, and FRA-TLV is a separate ticket. When I check in bags at LHR, will LH allow me to check bags all the way through to TLV even though the itinerary is on two separate tickets? If the IAD-LHR-FRA ticket is in business and the FRA-TLV ticket is in coach, will they enforce the coach luggage allowance? For these purposes, is TLV considered a European or intetcontinental destination?

Thanks!