Paris had the Friday the 13th terrorist attacks, this year, after the French government decided to bomb ISIS. If that attack were truly coordinated by ISIS and is a part of ISIS response, then London or another English city should expect a Paris-style terrorist attack.
Not all Muslims are extreme, but with the on-going intrusion of western countries into internal Arab/Muslim affairs/disputes in the Middle East, Muslims are making it their business to “intrude” into western cities. Tit-for-Tat.
London should attack Paris-style attacks (or worse!) in the very near future, because England-born Muslims are becoming ISIS fans, as more people die in the Middle East with London bombs (civilians will be killed by these attacks, since civilians are imbedded along with ISIS fighters in the Middle East.
What is certain is this, from the Christian perspective. The Holy Trinity will not protect the city of London from Islamic terrorism, because London has legalized gay marriage against the Law of God as found in the Holy Bible. English citizens have not fought to overturned this illegal (in-so-far as God’s Word concerned), so God is itching to punish Londoners and British citizens. Thus, God will allow terrorist attacks to kill many British Christians in divine punishment for not fighting gay marriage laws of the United Kingdom.