some credit unions are now [broken link removed]of the icb so I suppose they would share information.
There is also the consideration as to whether there is a question on the mortgage application form regarding other loans. Not sure I would be inclined to lie on a mortgage application given the possible implications, but that is just me.
Is your concern that if you disclose your CU loan that you would not get the mortgage based on affordability? Might the mortgage provider be correct in this assertion?