It is frankly jaw dropping that governments seem absolutely content to completely destroy their economies for the sake of prolonging a few (in the grand scheme of things) lives. Future generations who will be paying the price of this for their entire working lives will not look kindly on the catastrophic overreaction. Society has been conditioned to believe that every life is priceless and must be saved at any cost. In reality a death is a tragedy for the people directly affected by it, but the world keeps turning and ultimately doesn't care.
People will still want to travel when this is over. Brits will want to take holidays. Political pressure to enable leisure and business travel is going to be immense. A Spanish politician was posturing recently, stating that Brits wouldn't be allowed into Spain as tourists because of the time it took for the lockdown to be implemented here. I suspect that other tourist hotspots (Greece, Turkey, Egypt etc.) will have a more pragmatic attitude if the Spanish insist on being intransigent. Plans for a two week quarantine for returning tourists will, I strongly suspect, be quietly shelved.