Being rightwing doesn't in any way reduce the instinct to irony that is so characteristic of this country, Dave. And contempt towards Trump appears to be every bit as strong right across the political spectrum. Even Nigel Farage while fawning on the man seems to has considerable difficulty in concealing it.

The difference is that while the left sees him as a dangerous quasi-fascist, the right sees him more as a vulgar oaf. Both views are of course true.
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It has become clear in recent years that it is quite possible to hold strongly to what can be called socially liberal views on a whole range of issues, such as gay marriage, and yet be savagely repressive on economic issues, as demonstrated by slashing benefits and attacking workers rights.   

The conservatives retain power because they have managed to set this aside in order to retain an organic link with those who disagree strongly with the socially liberal stuff, but who share the economic priorities.

This would seem to indicate that the opposite combination is also perfectly possible. There's another thread ("we all agree on all but three things") which is perhaps relevant, though more in an American context.