From "The complete guide to the music of Pink Floyd", by Andy Mabbett:
QUOTE
High Hopes:
Gilmour has admitted that this, the first thing he wrote for the album,
is more personal than his usual style, and that it set the tone for rest
of the album. Its middle-eight Spanish guitar and marching drums, with
orchestral backing, sound like leftovers from 'The Wall'.
The bell which bookends the track is not the parliamentary Division Bell,
but may be intended to represent one at the Cambridge College, or those
of Ely Cathedral, both of which feature in Storm Thorgerson's promo video
for the song, as does the Gilmour family's former home in Cambridge.
...
The last thing heard on the album - it's very quiet - is a recording of
Samson's son Charlie hanging up the telephone on Floyd manager Steve O'Rourke,
emphasing the albums theme of poor communications. This is the band's witty
response to O'Rourke's constant requests to be allowed to play a few notes
on a Floyd album.