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Fixing water pressure - cylinder replaced or change to gas?

My partner and I have recently bought our first house and have terrible water pressure. We’d love to do something about it. We'd like to know if it would be possible to fix up, and whether we should replace the cylinder or change to gas. The hot water cylinder we currently have is an 180L low pressure 2010 cylinder (see attached). A wider cylinder would not fit. Any info on the quality of our pipes, eg if they may be causing lower pressure, would also be great. Thank you :)