Item 2 is definitely the more tedious of the 2 and is just solicitors being solicitors.
Does your extension and decking take up more than 50% of the garden? That's quite hard to do unless your extension/area of decking is exceptionally large (oo-er), or your garden is exceptionally small.
Assuming they are more than 4 years old, and you have evidence that dates them, then you could apply for a Certificate of Lawful Development should their solicitors look to use the above to try and negotiate the selling price.
Certificate of Lawful Development is a good shout
Decking was finished June 2016 (and it can't be 50%+ of garden but I'll get measurements tomorrow) and rear extension/work was completed November 2015.
Have invoices and emails confirming those dates.
Item 2 is definitely the more tedious of the 2 and is just solicitors being solicitors.
Does your extension and decking take up more than 50% of the garden? That's quite hard to do unless your extension/area of decking is exceptionally large (oo-er), or your garden is exceptionally small.
Assuming they are more than 4 years old, and you have evidence that dates them, then you could apply for a Certificate of Lawful Development should their solicitors look to use the above to try and negotiate the selling price.