Lenders don't advertise that they're willing to lend large amounts but most will only be too happy to lend depending on your circumstances.
The most important factors are the amount of your current salary and also how much you can place as an initial deposit.
For example, if somebody is thinking of buying a £3million property with just a £100k deposit then it will probably be impossible to find a lender.
But if the deposit were to be £1 million and the person's salary is £500k+ a year then I think many lenders would jump at the chance of doing business.