Paul was thinking very hard :
It's around (4) log periodic or Yagi antennas
pointed on a common vector.

They look as if they are probably fringe area TV yagi, all vertically
polarised - probably feeding individual TV's, though less likely they
might be set up as one antenna system, to try boost reception.


And these are not conventional wide-band UHF, three
of them look to be cut at a specific frequency. The
fourth has some slight log-spacing to it. Dipoles are all
the same length.

You are maybe seeing distortions of the photo/ different antenna
brands.


There are two verticals, attached to the top of the
mast poles. They're unloaded. While they could be
lightning arrestors, they have no spikey bit for
generating corona and "attracting" the lightning.

At the back of the chimney - They look like remnants of old 1950's 405
line antennas to me. You can see part of the X of a 405 line antenna,
peeping out from behind the chimney. The dipole of which, could be 405
line TV, or maybe an FM radio antenna.

The nearer vertical, with the much thicker feeder, could be anything at
all. Whoever installed it, went to an awful lot of trouble, to extend
the mast by a relatively small amount with a joiner clamp.

The actual antenna appears to be a white composite covered and also
appears to taper from bottom to top.


If you tipped the letter "F" upside-down, the two
arms of the F would represent the Yagi style antennas.
The leg of the F (upside-down) would be the mast and
vertical antenna orientation.

That's not all there is to see, but is some broad
brush strokes of a picture. There's a roof and a chimney,
and the chimney provides the mounting support.