Originally Posted by apudme
no you cannot get access to the BA lounge at ZRH if departing on LY unless you were a BA Gold or its oneworld equivalent
Only BA Gold members have the 'open doors' policy -- not oneworld equivalents...
Anyway, if I've read the OP correctly, he or she is flying LHR-BA-ZRH-BA-LHR-LY-TLV. Which would mean lounge access before the LHR-ZRH and ZRH-LHR flights, but nothing before the ElAl one.