Well worth putting in a complaint to your distribution company. Just be aware that they may or may not be able to do anything about it. Why don't you measure the voltage around the estate, always assuming you actually know anyone else on the estate... The whole area might be high, if so get them to complain as well.
Transformers:
Note that the fittings on the back of a 12V halogen are not the same as those on a mains one - hence you need new fittings as well. (not as daft as it sounds since it means you can't fit a LV bulb in a mains fitting!)
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.