A method, performed by a mobile terminal, of providing real time difference determination for enabling positioning of the mobile terminal in a telecommunication system, said telecommunication system comprising a plurality of eNodeBs in communication with a core network, each eNodeB having a plurality of associated cells, each cell potentially servicing one or more mobile terminals, said method comprising the steps of: determining (S10) a first timing advance value representative of a first geographical distance measure between said mobile terminal and a first serving eNodeB prior to a handover to a second serving eNodeB; determining (S20) a second timing advance value representative of a second geographical distance measure between said mobile terminal and said second serving eNodeB after said handover, wherein said determining (S10, S20) of said first and second timing advance values are performed, prior to and after said handover respectively, within a predetermined time interval relative to said handover; determining (S30) time of arrival measures between said mobile terminal and at least two eNodeBs of said plurality of eNodeBs, wherein said determined time of arrival measures are related to measurements on respective pilot signals from said at least two eNodeBs, and wherein said time of arrival measures are determined (S30), in association with said determining (S10, S20) of said first and second timing advance values, within said predetermined time interval; and signalling (S40), over a radio resource control interface, representations of said determined first and second geographical distance measures and said determined time of arrival measures for said mobile terminal to at least said second serving eNodeB, together with a respective unique identification parameter of said at least two eNodeBs. determining (S10) a first timing advance value representative of a first geographical distance measure between said mobile terminal and a first serving eNodeB prior to a handover to a second serving eNodeB; determining (S20) a second timing advance value representative of a second geographical distance measure between said mobile terminal and said second serving eNodeB after said handover, wherein said determining (S10, S20) of said first and second timing advance values are performed, prior to and after said handover respectively, within a predetermined time interval relative to said handover; determining (S30) time of arrival measures between said mobile terminal and at least two eNodeBs of said plurality of eNodeBs, wherein said determined time of arrival measures are related to measurements on respective pilot signals from said at least two eNodeBs, and wherein said time of arrival measures are determined (S30), in association with said determining (S10, S20) of said first and second timing advance values, within said predetermined time interval; and signalling (S40), over a radio resource control interface, representations of said determined first and second geographical distance measures and said determined time of arrival measures for said mobile terminal to at least said second serving eNodeB, together with a respective unique identification parameter of said at least two eNodeBs. <EOS>