I couldn't find a good bass tab for this whole song anywhere so I had to do my own. I
found the intro (which I have used in this tab too but a little changed). I don't think
perfect, I didn't spend a lot of time doing this and that didn't help a lot that I could 
find the intro tabbed, but at least it's better than nothing. I will post a much
one as I get it ready (will take a long time, maybe even a year 'cause I will do a very 
tab of every other Maiden song too, will post the others too as I get 'em ready). Enjoy 
UP THE IRONS!

A. Intro

|------------(7)---------(7)------(7)--------(7)-------(7)--(5)-------|
|--------(7)---------(7)--------(7)-------(7)-------(7)--------(5)----|
|----(7)---------(7)----------(7)------(7)-------(7)--------------(5)-|
|--0------------------------------------------------------------------|

|------------(7)---------(7)------(7)-------(7)--------(5)-----(5)-----|
|--------(7)---------(7)--------(7)------(7)-------(7)----(5)----(5)---|
|----(7)---------(7)----------(7)-----(7)-------(7)----------(5)---(5)-|
|--0-------------------------------------------------------------------|

|----------------------4-7-9----9--14-14-14-14-12-11----------------|
|------------------4-7-------------------------------12-12-12-12-11-|
|--------------5-7--------------------------------------------------|
|--0-0---0-5-7------------------------------------------------------|

|------------------------------------------(7)---------(7)-----(7)---------(7)-|
|--------------------------------------(7)---------(7)-------(7)-------(7)-----|
|--12-12-12-12-11------------------(7)---------(7)---------(7)-----(7)---------|
|-----------------12-8-8-8-8-7-3-0---------------------------------------------|

|---------(7)--(5)-------------------(7)---------(7)-----(7)-|
|-----(7)----------(5)-----------(7)---------(7)-------(7)---|
|-(7)------------------(5)---(7)---------(7)---------(7)-----|
|--------------------------0---------------------------------|

|---------(7)--------(5)---------(5)-----9---5---7---4---5-|
|-----(7)--------(7)-----(7)-(7)--------9---5---7---4---5--|
|-(7)---------(7)----------------------7---3---5---2---3---|
|----------------------------------------------------------|

|----9---5---7---4--5---------------(7)--------(7)-----(7)---------(7)-|
|---9---5---7---4---------------(7)--------(7)-------(7)-------(7)-----|
|--7---3---5---2---3---0----(7)--------(7)---------(7)-----(7)---------|
|-------------------------0--------------------------------------------|

|---------(7)--(5)-----------------(7)---------(7)-----(7)---------(7)-|
|-----(7)---------(5)----------(7)---------(7)-------(7)-------(7)-----|
|-(7)----------------(5)---(7)---------(7)---------(7)-----(7)---------|
|------------------------0---------------------------------------------|

|---------(5)---(5)----------------------------------------------|
|-----(7)----(5)----(5)---------------------5-4------------7-6---|
|-(7)-------------------(5)----3-2----5-4--------5---7-6-------7-|
|----------------------------------3------5--------------7-------|

|-------------------------------------------------|
|--5-4----10-9-----7-6----12-11-----14-13---------|
|------5-------10------7--------12--------14\2----|
|-----------------------------------------------0-|

|----------(7)---------(7)------(7)--------(7)-------(7)--(5)-------|
|------(7)---------(7)--------(7)-------(7)-------(7)--------(5)----|
|--(7)---------(7)----------(7)------(7)-------(7)--------------(5)-|
|-------------------------------------------------------------------|

|------------(7)---------(7)------(7)-------(7)--------(5)-----(5)-----|
|--------(7)---------(7)--------(7)------(7)-------(7)----(5)----(5)---|
|----(7)---------(7)----------(7)-----(7)-------(7)----------(5)---(5)-|
|--0-------------------------------------------------------------------|

|-------9-----5-----7-----4-----5-|
|-----9-----5-----7-----4-----5---|
|---7-----3-----5-----2-----3-----|
|---------------------------------|

|-------9-----5-----7-----4-----5-||
|-----9-----5-----7-----4-----5---||
|---7-----3-----5-----2-----3-----||
|---------------------------------||

B. Pre-Verse

|----------------------------------------------------------------------------------|
|o--------------------------------------------------------------------------------o|
|o-7-7--7-7-7-3--3--3--5-5--5-5-5-3--3--5--7-7--7-7-7-3--3--3--5-5--5-5-5-2--2--5-o|
|----------------------------------------------------------------------------------|

C. Verse

|----------------------------------------------------------------------------------|
|o--------------------------------------------------------------------------------o|
|o-7-7--7-7-7-3--3--3--5-5--5-5-5-3--3--5--7-7--7-7-7-3--3--3--5-5--5-5-5-2--2--5-o|
|----------------------------------------------------------------------------------|

D. Chorus
                                                   x4
|---------------------------------------------------|
|o-2-----------------------------------5-4-----4---o|
|o---3-2-------3-2---------5-4-------------5-0---5-o|
|--------3-0-0-----3-0-0-0-----5-0-0-0--------------|

E. Interlude

|--------------------------------------2----------------------------------------------2----------|
|o-----2-3-2-------2-3-2-------2-3-2-----3-2-0-3------2-3-2-------2-3-2-------2-3-2-----3-2-0-2-o|
|o-----------3-----------3-----------3----------------------3-----------3-----------3-----------o|
|--0-0---------0-0---------0-0--------------------0-0---------0-0---------0-0--------------------|

F. Guitar Solo                _____________________________ _____________________________
                             |1,3                          |2,4.
|----------------------------|-----------------------------|----------------------------|
|o---------------------------|----------------------------o|----------------------------|
|o---------7--x-x-5--x-3-3-3-|---------7--x-x-5--x-0-0-0--o|---------7--x-x-5--x-2-2-2--|
|--0-0-0-0-------------------|-0-0-0-0---------------------|-0-0-0-0--------------------|

|---------------------------------------------------------------|
|-----------------5-4---7-6-----------------------5-4---7-6-----|
|-3-2-----5-4---------5-----7-5-0-3-2-----5-4---------5-----7\--|
|-----3-0-----5-0---------------------3-0-----5-0---------------|
                              _____________________________ ____________________________
                             |1,3                          |2,4.
|----------------------------|-----------------------------|----------------------------|
|o---------------------------|----------------------------o|----------------------------|
|o---------7--x-x-5--x-3-3-3-|---------7--x-x-5--x-0-0-0--o|---------7--x-x-5--x-2-2-2--|
|--0-0-0-0-------------------|-0-0-0-0---------------------|-0-0-0-0--------------------|
 ___________________________________ ________________________________
|1,2,3.                             |4.
|-----------------------------------|-------------------------------||
|o-----------------5-4---7-6-------o|-----------------5-4---7-6-----||
|o-3-2-----5-4---------5-----7-5-0-o|-3-2-----5-4---------5-----7\--||
|------3-0-----5-0------------------|-----3-0-----5-0---------------||

G. Bridge

|-----------------------------------------------------------------------------|
|o----------------------------------------------------------------------------|
|o-7-7--7-7--7--7-7--7-7--7--3-3--3-3--3--3-3--3-3--3--5-5--5-5--5--5-5--5-5--|
|-----------------------------------------------------------------------------|

                           x3
|---------------------------|
|--------------------------o|
|-2-2--2-2--2--3-3--3-3--5-o|
|---------------------------|

H. Out-Chorus                           ______________ _____________
                                       |1,2,3,4,5,6.  |7.
|--------------------------------------|--------------|------------||
|o-2-----------------------------------|-5-4-----4---o|-5-4--------||
|o---3-2-------3-2---------5-4---------|-----5-0---5-o|-----5-0-5--||
|--------3-0-0-----3-0-0-0-----5-0-0-0-|--------------|------------||

Order:

1.  A. Intro
2.  B. Pre-Verse
3.  C. Verse
4.  D. Chorus
5.  C. Verse
6.  D. Chorus
7.  E. Interlude
8.  F. Guitar Solo
9.  G. Bridge
10. E. Interlude
11. C. Verse
12. H. Out-Chorus