Could you provide evidence regarding this, please? This is the first I've heard of this.
I have never even heard of a "Spanish Variant", let alone heard of any suggestion that it caused the second wave in the autumn, or that it was responsible for the Kent variant.
Even if there is a new variant, the overwhelming likelihood is that existing vaccines will give at least some protection against it.
Also, the government will not allow travel to any countries where a really infectious variant exists, and existing border controls, however regrettable they might be, will reduce (not eliminate) the risk of such a variant entering the UK.