<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.meya wa jiji la london sadiq khan ameamuru kufanyika kwa uchunguzi juu ya ongezeko la gharama za euro mil 50 wakati wa kuubadilisha uwanja wa west ham.  <response>: london mayor sadiq khan has ordered an investigation into why there has been a 50 million increase in the cost of converting the london stadium 