So I have a question I hope you guys can help me with

I've been looking at prices for some time now for HEL > LHR or HEL > EDI via LHR

I priced it up this morning

CE - HEL > LHR return in the middle of October = 450 Euros
CE - LHR > HEL return on the exact same dates = 250 Pounds

I thought it was usually cheaper flying from Europe rather than from London, and I'm a little confused with the fares.

I'm flying from Helsinki is there any suggestions or ways around this?

Thanks in advance,

Colnic2011