Allowing for the fact that this race took part on the superb Barcelona circuit and it was a support race to the Spanish GP it is very surprising that only 15 cars arrived of which a significant proportion were British drivers/teams. Most notable entries were Colin Vandervell in the semi-works Brabham, also Brabham mounted were Brendan McInerney and David Purley. James Hunt was in his March 713S as were Tim Goss and German lady driver Hannelore Werner with their 713s also. Top Lotus drivers were Andy Sutcliffe with his 69 and Manfred Möhr with his Lotus-Novamotor 69.
Practice saw Möhr set the fastest time from Vandervell and Hunt, the second row was made up of Chris Skeaping with his Chevron-Rowland B17 and Sutcliffe’s Lotus. At the flag fall Hunt took the lead with Möhr and Vandervell in close pursuit with Sutcliffe passing Skeaping for fourth. After a couple of laps Hunt and Möhr began to pull away from the rest but then on lap 5 it began to rain, very quickly the rain became very heavy indeed and cars began spinning off all over the track. Möhr lost his Lotus and damaged the exhaust system then Hunt spun damaging his radiator but such was his lead he was able to pit and still come out in the lead. Vandervell spun out when his throttle stuck open and Skeaping slowed with drowned electrics. Through all this mayhem Bernard Lagier in his Brabham-Holbay BT35 moved up from the back of the grid to second by virtue of keeping out of trouble. Andy Sutcliffe was now in the lead as Hunt had to retire with overheating caused by his accident damage but it was now the turn of the engine in Sutcliffe’s Lotus to go sick and a surprised Lagier took the lead he was to hold to the finish. Sutcliife managed to nurse his car to second whilst Goss and his March finished third despite a last minute spin.