Foster wuxuu si joogto ah uga soo waramayaa wararka iyo dhacdooyinka waaweyn ee ka socda goobta, oo ay ku jiraan aftida madaxbannaanida Scotland, doorashada guud ee Boqortooyada Midowday ee 2015 iyo 2017, aftida xubinnimada Boqortooyada Midowday ee 2016 iyo dabka Grenfell Tower. Wuxuu sidoo kale ka soo muuqday goobta weerarada argagixisada ee Yurub oo dhan oo ay ku jiraan weeraradii Paris ee Nofeembar 2015, qaraxyadii Brussels ee 2016, weerarkii gaariga ee Nice ee 2016
, weerarkii xamuulka ee Berlin 2016, weerarkii London Bridge 2017 iyo weerarkii xamuulka ee Stockholm 2017.