beirut iran treat british-iranian aid worker iranian citizen serve sentence determine judiciary iran foreign ministry spokesman say monday british foreign secretary boris johnson discuss nazanin zaghari-ratcliffe case iranian officials fly tehran weekend try seek release one issue johnson bring tehran issue ms. zaghari iranian foreign ministry spokesman bahram qassemi quote state media say regard dual nationality point view course iranian sentence judiciary serve period sentence britain say zaghari-ratcliffe visit family holiday april 2016 jail iran attempt overthrow government johnson say urge release dual nationals urge release humanitarian ground cause johnson tell british parliament complex case involve individuals consider iran citizens wish raise false hop meet tehran worthwhile say early confident outcome zaghari-ratcliffe dual national hold iran case take political significance britain johnson say last month teach journalists iran employer deny johnson late apologize opponents call resign comment lead serve long prison qassemi say iranian foreign ministry would follow zaghari-ratcliffe case say ultimately matter judiciary project manager thomson reuters foundation zaghari-ratcliffe sentence five years prison convict iranian court plot overthrow clerical establishment deny charge thomson reuters foundation charity organization independent thomson reuters operate independently reuters news say zaghari-ratcliffe holiday teach journalism iran johnson also say raise foreign minister mohammad javad zarif call official harassment journalists work bbc persian families inside iran bbc call iran reverse court order say effectively freeze non-liquid assets 152 staff former staff contributors iran iran treat jail aid worker iranian citizen foreign ministry