And the same UHF aerial would be suitable for either black-and-white or colour reception?
Fundamentally, the aerial requirements for colour and black-and-white reception are the same. An aerial which gives really good black-and-white pictures will be equally suitable for colour. But on the other hand, an inadequate or poor aerial would have a much more noticeable effect on colour reception than on black-and-white. It is thus always advisable to have an efficient roof or loft aerial for colour reception, and, if possible, also for black-and-white reception. Your local dealer or rental company should be able to advise you on a suitable type of aerial for your particular location. Typically a UHF aerial having about six compact elements will be suitable in areas of good signal strength; about 10 to 12 elements for medium strength areas; and more than 12 elements, either in a single array or distributed in ‘stacked’ forms (two or more smaller arrays correctly used together), for longer distances or where your house is screened from the transmitter. It is always better to have too much signal than too little – and a good aerial, well installed, is likely to prove the cheapest in the long run. Since the length of a UHF aerial element is only a few inches, even aerials with many elements are often more compact and lighter than those with far fewer elements for VHF.