The bass riff consists of four main parts and is played throughout the song.
Riff 1
G|------11---11---12-------11---11------9----|
D|--9-9----9----9--------9----9----9-12------|
A|-------------------------------------------|
E|-------------------------------------------|
Play twice then move on to the part below.
Riff 2
G|--------------------9-------9----9/11--11---------|
D|--------12----12--------------------------14-12---|
A|--10-10----10----10------10---10------------------|
E|--------------------------------------------------|
Play twice then move on to the part below.
[ Tab from: https://www.guitartabs.cc/tabs/t/tinie_tempah/let_go_btab.html ]
Riff 3
G|------11---11---12------11---11------------|
D|-----------------------------------12-14---|
A|--7-7----7----7-------7----7----7----------|
E|-------------------------------------------|
Play twice then move on to the final part of below.
Riff 4
G|--------------------9-------9----9/11--11---------------------------------|
D|--------12----12--------------------------14-12-12/14--14-14-12/14--14-14-|
A|--10-10----10----10------10---10------------------------------------------|
E|--------------------------------------------------------------------------|
Riff 4 Continued
--------------------------|
12/14--14-14-12/14--14-14-|
--------------------------|
--------------------------|
Once you have finished the fourth section of the riff, return to the start and play it
again and again and again and again lol enjoy! ;p