Buzzard.
Reasons:
The beak - small and hooked = Buzzard, eagle beaks are massive and just seem to be an extension of the head, they have a longer straighter top before curving down to the hook, this is called the culmen and would be about 4cm long on a Golden Eagle, your bird does not exhibit this.
Juvenile Golden Eagle have much more dark colouring on their underwings especially on the leading edge side and as they age the white patch becomes fairly well defined , in your case underwing pattern is very Buzzard and has way too much white on them to be a Juvenile Golden.
Wing size, the upward wing stretch on the post indicates each wing is roughly the same size as the length of the bird, head to tail, a Golden's wing is easily longer than body of the bird and the wings are wide... really wide.
Whilst we are on the stretched wings, if your post estimate is spot on at 1m then if it's a Golden then the wing stretch should be of similar length, but its not, at roughly 2/3rds the length of the post it fits with a Buzzards 4 foot wing span.
Tarsus (leg) feathers, on a Golden they cover the entire leg, on a Buzzard they stop well short, your taking off bird is showing plenty of leg.
Sorry, I'm sure it's a Buzzard...
I found this on a site about the confusion between these two species in Scotland, I hope the original author doesn't mind me quoting it:
1. Some Buzzards really are large
2. People don't realise just how enormous eagles are
3. People REALLY want to see an Eagle.
Kev