personal injury trust

Hello. Does anyone know of an institution which would be able to hold a modest PI payment for under 10,000? So few banks etc seem to do it now,
10 years ago my trustees and I opened a Trust PI account with Metro bank, instant access. A small amount of interest p/a and no withdrawals. Had to countersign lead trustee change of address form recently and was infomed by Metro that this was the wrong account for the PI (after 10 years and no notice). They want me to open another account with them with a slightly different name still called a Trust account, pay them £150 and £5 a month to run it as is was a small deposit! I think this is really odd as well as unfair. Metro have also been an unhelpful and abrupt company to deal with.
However if the money can be moved to another bank/b society, would I need to notify the DWP (again) and would the money then count as savings....hence pushing me over the £6000 limit allowed by the DWP as discounted towards benefit calculations?
Could I argue with Metro that the account I have was missold and has been in effect a Holding Account since they have changed the Terms and Conditions without notifiying me first? Thanks