Numbers and letters Quiz

[bloater]

Any help please with the following (eg.7D in a W -Seven days in a week

4PG

M6TR

5FS

10MR

6FG

S and 20

MA5

[Marsh]

5FS and 6FG are from a traditional Irish verse about magpies (someone posted it here about a week ago but I can't find it again)  The verse runs

One is for sorrow
Two is for joy
Three for a wedding
Four for a boy
Five is for silver
Six is for gold
Seven for a thing
that can't be told

 

[Marsh]

What is love? 'tis not hereafter;  
Present mirth hath present laughter;   
 What 's to come is still unsure:  
In delay there lies no plenty;   10
Then come kiss me, sweet-and-twenty!   
 Youth 's a stuff will not endure

William Shakespeare - also already posted here I think.

[dobbie]

M6TR  is the M6 toll road