If you would rather not construct, these are alternatives, I have, at one time or other, used them.
1) Par end-fed....but only single band at QRO level.
2) Bell-Imel Group "no counterpoise" antenna. Sold on e-bay (US). Fifty-feet long, well constructed, 10 through 40 meters, has a PL-259 to connect directly to required antenna tuner. So you will have some RF inside. Rated to 100 watts. Reasonable price. Cheap for you considering pound/dollar exchange rate.
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