First of all we try to understand the title. 

We generally think that the procession is something religious but the adjective ignoble has got a negative meaning. 

The reader is pushed to find a possible answer so he reads the text to understand better the title.

At the second time the reader analyses the layout: the poem is organised into 12 lines it consists in 3 stanzas and it is written with free patterns.

There is the first introductory stanza, where people's tail comes out from the tube, it is compared with an ignoble procession.

The second stanza shows more patterns then the first one, the poet tries to recreate the sound of people who go to work in London because they are pressed by the scare to arrive late. The poet confesses to fell humiliating when he looks the ignoble procession of the people, they are only legs, they don't have a specific identity, they result a chaotic glue and they are ignoble. The use of the words wallet-carrying underline the economic aspect that is the reason why this hurry.

The second stanza ends with the pronoun "I" with who the poet takes the distance by the people.

The most important word in the second stanza is humiliation, that is the key word. 

In the meaning of some word we can image where people walking.

The procession is ignoble because people go very fast.

Also in this stanza the poet tells us why they are walking: for fear of being late (they are going to work).

In the second stanza there is a metonymy: legs.

There is the repetition of some letters like F and M (alliteration)

The progressive spect (second stanza) adds fast rhythm to the lines together with the use of some adjective.

Thanks to the description of the poem we can imagine people of certain class.

 The last stanza makes you think and reflect. It consists into only three line and its rhythm is very slow because it's sums up all the poem so the reader can focus his attention on the word humiliation.

In the economy of the text the last stanza is short, it relies on the exploitation of two semantic choices: hates and humiliation.