If thats all the movement since the house was built its probably fine.
How long have you lived there and has it changed. If a short time was it surveyed properly (ie not the cheapest valuation survey)?
Why haven't you circled the bit above the windowthat would concern me more
Yes I agree it mainly looks like water damage to me.
So first call would IMO be to work out whats allowing water to penetrate and deal with it.
Are they metal, and external? A little odd.