squeeling belt

[Big Boris]

Hi all ,
my power steering is a little bit heavier than normal and is squeeling a bit when i turn ,ive tightened the alternator belt as this seamed slack but its still making a squeeling sound ,do i just need to tighten it more ? or should i be looking to tighten the belt below which seems a little slack too ?fluid levels are good ,its a 1.6td lhd westy california ,its been standing under a barn unused foe about 6 mths,
Ta

[Big Boris]

All sorted ,the power steering belt at the bottom was very slack swell