I have been told it’s not that critical if it seems to be a typographical error in PPR. Just make sure it has your UCI and application number.
Simply make a nice table stating your height and eye colour (if they have asked for it), UCI, Application number, Passport number, D.O.B, first and last name on a blank paper.
Under that table, explain the situation to them in brief that they have made a typographical error in your name while sending the PPR ask them to rectify the mistake while sending the COPR and visa or any further document. Later, copy paste the same paragraph and e-mail them the same and tell them that you have sent your package.