Question $1($Cont$\text{'}$d$)$

c$)$ Using the information contained in Figure Q$1($b$)$ and in accordance with Technical Guidance Document $($TGD$)$ Part L of the Building Regulations, calculate the overall U$-$Value $(\backslash (\backslash$mathrm$\{$W$\}/\backslash$mathrm$\{$m$\}^\{2\}\backslash$mathrm$\{$~K$\}\backslash ))$ of the timber$-$frame wall depicted in Figure Q$1,$ where one of the layers of insulation is thermally bridged.