That's what I thought. One other quick question then, what's a variance?
It's the difference between the conditions of your visa and your actual situation. The law says they need to be filed and assigned to a caseworker. Yours is a classic example, but also the case where a WP holder gets made redundant, or if a WP dependent gets separated/divorced from the WP holder, or if a spousal visa goes in to curtailment.
A beneficial side-effect is the CYA. If they ever check and ask you about it, you can say, "Oh yes, I filed a variance on such and such a date and my caseworker was so and so". End of question.
How they react to them largely depends upon how it's presented. Sometimes it's adequate to simply call or fax them - or even to drop by an immigration office (late on a Friday afternoon)
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; other situations that have some delicate issues call for some planning and word-smithing.
But I like Balmer's advice to hang tough at the uni office and spoonfeed them...