We have similar and secured anything that is creaking or unsupported because it has been chopped in the past, replace any which are particularly short or where a board has been chopped into 3/4 pieces. My dad's recommendation is to PVA the first 18 inches around the walls, caulk under the skirting and for the first few cm floorboard gaps to try and stop dirt getting around the underlay at the edge and into the carpet
Carpet fitters will on the whole turn up with underlay, carpet and the bits needed to fit.
We have similar and secured anything that is creaking or unsupported because it has been chopped in the past, replace any which are particularly short or where a board has been chopped into 3/4 pieces. My dad's recommendation is to PVA the first 18 inches around the walls, caulk under the skirting and for the first few cm floorboard gaps to try and stop dirt getting around the underlay at the edge and into the carpet
Carpet fitters will on the whole turn up with underlay, carpet and the bits needed to fit.