You should always consider having a detailed independent survey carried out on the property you’re buying. Don’t rely on the mortgage lender’s valuation – it’s not a thorough inspection (and is often a “drive-by” valuation) and therefore will not reveal any potential issues with the property which a full Homebuyer's Report will flag up.
We can recommend a surveyor to you if you wish or you can consult the website of the Royal Institution of Chartered Surveyors for surveyors in your area.
Under English Law as it currently stands, a property is bought in its existing state and condition and it is unusual for the seller to be required to compensate you for things which you ought to have been aware of before buying it. This concept is often referred to as “caveat emptor”. It’s therefore vital that you satisfy yourself as to the state and condition of the property before contracts are exchanged.