I was prompted to read the explanation offered by NS&I (National Savings) on their web site after being alerted to it by my co-attorney who was trying to deal with a savings certificate maturity for my elderly father. In essence it says they are too busy to cope because everyone wants to put money with them.
I personally have long ago given up looking for the best interest rate on my deposit money, but I don’t have that much outside of my pension fund and trading portfolios. Some of my readers will have large sums on deposit and want to see some return on it. Would you be dealing with NS&I when their ISA savings rate (which seems to be their main promotion) is 0.1%?
I realise, of course, that most people will treat the 1% tax free return on the Premium Bond prize fund as enough to take a punt. The limits for Premium Bond investment are now generous enough to soak up quite a large chunk of reserves. I suspect it is sale of these bonds and the potentially accident prone (from an administration point of view) decision to switch prize payment to direct bank credits only that is behind NS&Is recruitment of an extra 260 staff.
With even august and secure institutions like Nationwide Building Society offering 0.5% (according to my quick scan of Moneyfacts) on their triple access account, then there would seem to be no reason to put money with NS&I other than in Premium Bonds. Or is there?

I suspect the large number of people who currently have much more money to hold on deposit than the FSCS protection of GBP85000 may get very tired of dividing their money up between multiple institutions.
I notice that many of the best interest rates on offer as shown on Moneyfacts are from some pretty new or specialist banks. One would need to know something about their security before making large deposits with them, I suggest.
One I checked out just because I knew of it from some years back – as a lender. That was Hampshire Trust plc. It appears to be totally sound as a business but it does specialise in development finance lending. Its reserves are well in excess of the statutory minima and it has a good chunk of liquidity on call with other banks. Having said that, in my personal judgement, a severe and sustained collapse of the property market might leave this bank with serious problems. You may take a different view after reading the company’s accounts.
My suspicion is that with interest rates being low and being likely to stay low, some people are valuing security and the certain ability to get their money back as more important than the odd fraction of a percent on the interest rate.
If you have the time and can do the research, and don’t mind dividing your money into GBP85k pockets, assuming you have more than that, you will get rewarded with a few quid in interest (after tax on larger sums, of course).
But I reckon that NS&I is sucking in plenty of funds from the public to help with the governments record borrowing, and in the main it is borrowing from citizens at virtually no cost. NS&I is the only absolutely secure home for a surfeit of cash.
