Power steering belt loose( terios)

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Evening gents . I’ve fell in love with my terios and it’s been superb since buying it in March but now I’ve a problem.
The power steering is going funny . If I turn it while static I can feel it thumping through the steering wheel. It squeals a bit and although drive able I’d like to fix it.
I’ve noticed the belt isn’t the tightest but can see any adjustments? It looks newish .

It’s a vehicle I use off road for fishing and shooting and I’d just be gutted to spend hundreds on it as I paid £750 for it expecting a year out of it but it’s just brilliant.