Heard this one a few weeks ago when the winds where up to o lets say 30 kts with gusts going over fourty. full cross!!! . .. .during short periods the winds would ease up a bit. the place..? London City. .. .a 328 sits at the departure end awaiting release and a regional 146 is on final app to RWY28.Its getting a bit close so the controler calls for a goaround for the 146. twice...three times..a fourth time...no awnser.... .. .the 146 go's around(250' above the 328) and the tower calls the 146 again trying to establish communications.... .. .calmly the 146 reply's....."tower go ahead". .tower explains he was calling for a 'go-around' several times and asking why he did not reply?. .. .awnser:.."don't understand 'go-around'???.."