Buyers are subject to the legal principle of 'buyer beware'. This means you can only ask the vendor to pay for defects you find before you buy. Afterwards, it's too late as you are then responsible for those defects, potentially costing you tens of hundreds, if not tens of thousands of pounds.
So which out of the 35 searches on the market do you order?
It can be confusing; that’s where an expert conveyancer should help. It’s your choice, but don't be persuaded to scrimp on buying just the two basic searches, because this risks you missing defects you could have found in a full pack. Ask your conveyancer about a five-pack search bundle. Most good specialists offer this and most at a discount to help you move.