Understanding Society User Support

I am currently writing my dissertation on the Impact of Obesity on Wages in the UK Labour Market using Waves 2 and 3.

I would like my dependent variable to be an individual's hourly wage and I was wondering if you had any additional data on hourly wages or a way to derive this variable using other variables in the dataset.

I am currently using total monthly labour income gross (x_fimnlabgrs_dv) but it would really help my analysis if I could derive an hourly wage variable or if you could recommend another pay/wage variable to use.

I was wondering whether it'd be possible to divide total monthly labour income gross (b_fimnlabgrs_dv) by 4.348(average number of weeks in a month) and job hours to create an average hourly wage variable but thought this may be a bit of an ad hoc way.