While the company did not release a figure, the United Kingdom press, including Reuters, reported up to 1,000 jobs would be shed and production would be cut at its Solihuall and Castle Bromwich plants.
Jaguar Land Rover is set to cut 1,000 agency staff from its workforce because of declining sales in its home market.
JLR said: "In the light of continuing headwinds impacting the auto industry, we are making some adjustments to our production schedules and the level of agency staff".
It is not renewing the contracts of a number of agency staff at the Solihull site and would be informing staff on Monday of its plans for the 2018-19 financial year. We are however continuing to recruit large numbers of highly skilled engineers, graduates and apprentices as we over-proportionally invest in new products and technologies.
The company stressed it remains committed to its United Kingdom plants, having invested more than 4 billion pounds since 2010 to future-proof manufacturing technologies to deliver new models.
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Following a review of planned volumes, we are planning to make some temporary adjustments to the production schedule at Halewood in Q2. JLR employs around 40,000 people across six sites in the UK.
Industry representatives had warned that the impact of "diesel demonstration" - and concerns for the future of the sector following Brexit - could mount pressure on United Kingdom vehicle makers, though brands such as Nissan and Vauxhall both recently committed to continued assembly at their British factories.
Jaguar's XE and XF are understood to have been affected most heavily by this, although nearly every model has been impacted because diesels account for around 90% of JLR's sales.