Understanding Society User Support

Dear User Support team,

I hope you are doing well. I am writing to you regarding a question about using BHPS 18 and UKHLS 1 in my analysis. I am doing a cross-sectional pooled analysis from 2007-2019 and wanted to use both BHPS wave 18 data and UKHLS wave 1 data in it, focusing on the GHQ variables which are available in both of these data set. To my understanding the recommended approach is to combine BHPS 17 with UKHLS 1 onwards or BHPS 18 with UKHLS wave 2 onwards for longitudinal analysis. My question is could I combine BHPS 18 and UKHLS 1 in order to capture more observations in my analysis which is cross-sectional in nature and if so, what would the recommended way to create/use a weight that reflects this appropriately in my analysis?

Thank you very much for all your help.

Best wishes,
Arpita