A modular wind turbine blade comprising a first blade module and a second blade module , the first blade module comprising a first spar cap portion extending longitudinally in a spanwise direction, and the second blade module comprising a second spar cap portion extending longitudinally in the spanwise direction, the blade modules being configured for connection end-to-end via their respective spar cap portions, the first spar cap portion comprising a plurality of first elongate fingers defining a plurality of first recesses therebetween, the first fingers extending in the spanwise direction and tapering in width towards respective first finger tips ; the second spar cap portion comprising a plurality of second elongate fingers defining a plurality of second recesses therebetween, the second fingers extending in the spanwise direction and tapering in width towards respective second finger tips ; the first and second finger tips being mutually opposed and spaced apart in the spanwise direction such that a connection region is defined between the first and second finger tips; the first and second blade modules being connected by at least one connection element comprising a first tapered portion , a second tapered portion , and an intermediate portion between the first and second tapered portions; wherein the first tapered portion is received in a first recess between adjacent first fingers , the second tapered portion is received in a second recess between adjacent second fingers , and the intermediate portion is located in the connection region ; characterised in that : the modular wind turbine blade further comprises a U-shaped channel , wherein the first and second elongate fingers extend into the U-shaped channel from opposed ends of the channel, and wherein the at least one connection element is substantially encased in adhesive within the U-shaped channel. the first spar cap portion comprising a plurality of first elongate fingers defining a plurality of first recesses therebetween, the first fingers extending in the spanwise direction and tapering in width towards respective first finger tips ; the second spar cap portion comprising a plurality of second elongate fingers defining a plurality of second recesses therebetween, the second fingers extending in the spanwise direction and tapering in width towards respective second finger tips ; the first and second finger tips being mutually opposed and spaced apart in the spanwise direction such that a connection region is defined between the first and second finger tips; the first and second blade modules being connected by at least one connection element comprising a first tapered portion , a second tapered portion , and an intermediate portion between the first and second tapered portions; wherein the first tapered portion is received in a first recess between adjacent first fingers , the second tapered portion is received in a second recess between adjacent second fingers , and the intermediate portion is located in the connection region ; characterised in that : the modular wind turbine blade further comprises a U-shaped channel , wherein the first and second elongate fingers extend into the U-shaped channel from opposed ends of the channel, and wherein the at least one connection element is substantially encased in adhesive within the U-shaped channel. <EOS>