A connector assembly (1, 201) for affixing an upper tubular member (2, 202) to a lower tubular member (12, 112, 212) in an upright configuration of said tubular members, the connector assembly comprising a first connector portion (20, 220) and a second connector portion (22, 222), the first connector portion having a first mounting portion (17, 217) and the second connector portion (22, 222) having a second mounting portion (19, 219), one of said mounting portions being for affixing at an upper end (3, 203) of said lower tubular member (12, 112, 212) and the other of said mounting portions being for affixing at a lower end (7, 207) of said upper tubular member (2, 202), the first connector portion comprising a ring (24, 224), the ring extending around a ring axis (28, 228) and comprising a radially outwardly directed flange (40, 240), and the second connector portion (22, 222) comprising a collar (26, 226) and a plurality of clamping modules (34, 234), the collar extending around a collar axis (30, 230) and comprising a clamping portion (45, 245) and a radially inwardly directed lip (44, 244), wherein: - the clamping portion (45, 245) of the collar has an opening for receiving the ring (24, 224) whereby the ring may, in use, be received within the collar (26, 226) in a substantially coaxial orientation with the flange (40, 240) in abutting contact with the lip (44, 244); - the clamping portion (45, 245) of the collar has a plurality of apertures (68, 268), each aperture extending through said clamping portion in a radial direction and said apertures being spaced apart from each other around a circumference of said clamping portion; - each clamping module (34, 234) comprises a housing (50, 250), a clamping member (36, 236) and a clamping actuator (33, 233), said clamping member being movably held within said housing and said clamping actuator being configured to drive said movement of the clamping member; and whereby each clamping member (36, 236) when driven by the clamping actuator (33, 233) moves radially inwards through said corresponding aperture (68, 268) towards the ring (24, 224) received within the collar (26, 226) whereby said flange (40, 240) is clamped between the lip (44, 244) and said clamping members (36, 236) in order to secure the ring within the collar, characterized in that - each of said housings (50, 250) is separately affixed to the clamping portion (45, 245) of the collar at a corresponding one of said apertures (68, 268). - the clamping portion (45, 245) of the collar has an opening for receiving the ring (24, 224) whereby the ring may, in use, be received within the collar (26, 226) in a substantially coaxial orientation with the flange (40, 240) in abutting contact with the lip (44, 244); - the clamping portion (45, 245) of the collar has a plurality of apertures (68, 268), each aperture extending through said clamping portion in a radial direction and said apertures being spaced apart from each other around a circumference of said clamping portion; - each clamping module (34, 234) comprises a housing (50, 250), a clamping member (36, 236) and a clamping actuator (33, 233), said clamping member being movably held within said housing and said clamping actuator being configured to drive said movement of the clamping member; and whereby each clamping member (36, 236) when driven by the clamping actuator (33, 233) moves radially inwards through said corresponding aperture (68, 268) towards the ring (24, 224) received within the collar (26, 226) whereby said flange (40, 240) is clamped between the lip (44, 244) and said clamping members (36, 236) in order to secure the ring within the collar, characterized in that - each of said housings (50, 250) is separately affixed to the clamping portion (45, 245) of the collar at a corresponding one of said apertures (68, 268).