Will UCAS contact my current employer

I am currently waiting to apply for a graduate entry degree at University, but have read that in the declaration by UCAS that:

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If we need more information about you

We, and the universities and colleges, may, at any time, ask you, your referee or your employer to provide more information about your application. For example, we may need to see proof of:

* your identity
* your status
* your qualifications
* your employment history.

If we do not receive that information by a set date, or if the information is not satisfactory, we can cancel your application without giving you your application fee back..

Doe they contact employers often?

Do you know if they did contact your employer in the end?