Professional cleaning products - any recommendations ?

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I need to give an empty, filthy house a thoroughly deep clean to prep it for sale.
Can you please post your recommendations for any high strength cleaning products and where I can find them ? Cheers.

Anything from HG - their mould remover especially and limescale remover
pink stuff works well too and the black harpic for toilets
apart from that a good set of scrubbing brushes, endless washing up liquid and boiling water!

can I help? Would bloody love that

Another for HG products.👍

Cheers both ... ha ha ! I know ! I can't wait to get stuck in 😂