Mortgages, wage slips and deductions for employer share save

[Ynox]

I'm looking into taking part in my employer's share save deal. This is extremely generous - getting on for doubling the return I invest (and way beats crappy ISA rates right now). This might result in some chunkyish deductions on my payslips (think in the region of £600-700/month).

Normally it'd be a no brainer, but I'm looking at selling my flat next year to get a house. House would be valued at ~£400-450k (so 4-4.5x joint earnings). The plan will be to sell the stock before applying for the mortgage.

How would mortgage companies take this? I'll have scaled back the deductions by the time we actually apply for the mortgage but if the mortgage company wanted 6 months of wage slips then this may result in a couple of the wage slips showing these large deductions.

[Ynox]

Hmm. Might be borderline, especially if end up ploughing in a fair bit of money to maximise the return.

Likelihood is I'll have reduced the deduction significantly by January, with the idea being to apply for the Mortgage sometime around the end of March.