The decision to scrap the education maintenance allowance (EMA) - a grant for the poorest teenagers to help them stay in school or college - has had the biggest impact, Mr Burns said.
The final outcome of the decision to raise tuition fees to a maximum of £9,000 per year is "not yet known", he added.
More top news
Food prices will rise across the UK unless EU workers are allowed to remain as part of the Brexit negotiations, industry bosses have warned.
A north / south split in conditions tomorrow. Remaining mild
Polluting cars and vans could be permanently blocked from the French metropolis if it keeps to its mayor's recent clean-air commitments.