This section has effect as respects head A of Class 1 in section 155.
Head A shall not apply where the trade is a trade—
Where the trade is a trade of dealing in or developing land, but a profit on the sale of any land held for the purposes of the trade would not form part of the trading profits, then, as regards that land, the trade shall be treated for the purposes of subsection (2)(a) above as if it were not a trade of dealing in or developing land.
Where ... section 19 of ITTOIA 2005 or section 42 of CTA 2009 applies (tied premises: receipts and expenses treated as those of trade), the trader shall be treated, to the extent that the conditions in subsection (1) of that section are met in relation to premises, as occupying as well as using the premises for the purposes of the trade.