“In summary, the question to be asked when considering whether someone has a reasonable excuse for failing to pay an amount of tax on time because of a cash flow problem is whether the insufficiency of funds was reasonably avoidable. A cash flow problem would usually be regarded as reasonably avoidable if the person, having a proper regard for the fact that the tax was due on a particular date, could have avoided the insufficiency of funds by the exercise of reasonable foresight and due diligence. If the cash flow problem was reasonably avoidable then the mere fact that the taxpayer could not afford to pay the VAT at the proper time would not, without more, be a reasonable excuse. On the other hand, if such foresight, diligence and regard would not have avoided the insufficiency of funds then the taxpayer will usually be regarded as having a reasonable excuse for the VAT having been paid late until it would be reasonable to expect the taxpayer to have found alternative funding or taken other action to counteract the insufficiency.”