https://www.gov.uk/government/uploads/s ... 6_v1.2.pdf
Pg 102
6.18
You must not continue to sponsor a migrant who is absent from work without pay for
4 weeks or more in total, other than for the reasons listed above. You must report this
using your SMS account. This applies whether the migrant is absent from work over a
single period or more than one period during any calendar year (1 January to 31
December). The 4 weeks is calculated according to the migrant’s normal working
pattern.
An example of this is if the migrant works 3 days per week (3 days x 4 weeks) it would
be 12 working days.
In other words your continuous period is not broken for ILR if you take up to 4 weeks(20 working days if you work 5 days a week) of unpaid leave. However you would need to submit a letter to UKVI detailing you unpaid leave from your employer.
