I am using Minecraft 1.8

I have just been using Minecraft for around 4 days since purchasing last week. It worked fine for first couple of days. This has now changed and repeatedly crashes since Saturday

When opening minecraft the launcher works fine and everything looks normal. When you enter the selected world the system then crashes and drops out of Minecraft within a few seconds. I have attached the error message below

I have tried to enter minecraft several times over the past couple of days always failed and always with the same error message