i am going to Marsa Alam from Manchester in December via Thomson and it says that its 7hrs 35 there, but 4 hours 10 back!! I think it may be wrong. Egypt are 2hrs ahead, and the flight leaves Manchester 10.15 am and lands local time 17.50 so i work this out to be 5 hours 35! I think that Thomson need to amend their website!
There are no direct flights from Manchester to Lagos Nigeria. You will need to take a flight from Manchester to London Heathrow which takes about 30 minutes, and then an interconnecting flight from Heathrow to Lagos, which is about 7 hours long. That combined with the Manchester to London flight will take about 7 hours and 30 minutes in total.