**Table 4:** Mean values and errors for the principal and derived parameters including ${\alpha }$ variation.
Parameter	Mean value and $1\sigma$ error
$\Omega_{\rm B} h^2$	$\rm0.0215_{-0.0009}^{+0.0009}$
$\Omega_{\rm CDM} h^2$	$\rm0.102_{-0.006}^{+0.006}$
$\Theta$	$\rm 1.021_{-0.017}^{+0.017}$
$\tau$	$\rm0.092_{-0.014}^{+0.014}$
$\Delta \alpha / \alpha_0$	$\rm -0.015_{-0.012}^{+0.012}$
$n_{\rm s}$	$\rm0.965_{-0.016}^{+0.016}$
$A_{\rm s}$	$\rm 3.039_{-0.065}^{+0.064}$
H₀	$\rm 67.7_{-4.6}^{+4.7}$

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