Factual error: The action takes place around the second half of June (either side of the Glastonbury festival weekend). At the beginning of the film leaving work early evening in time to get home for dinner, in the UK, it wouldn't be dark. Later on, there isn't that much snow in the Alps, especially below the tree line, at that time of year.
Question: When Merlin stepped on the land mine, why didn't he just wait there until Eggsy and Harry completed the mission? Surely he could have just stood there, then later on they could have called in bomb experts or use Statesman resources to get him off that thing? Eggsy and Harry could have easily taken out those 5 guards.