YABU
This is way down the list of priorities at the moment. It will take some time to create something which is secure and not easily forged for a start.
Also, international travel for the majority is big something I think we should jump into right now. I think we need freedom of movement and more normality within the UK before adding in foreign travel. And we need to look at what is going on abroad, as well as the need to be vigilant for new strains. Part of that issue is that not all countries have as good genomic analysis of covid-19 as the UK and so are slow to pick up new variants within their countries. This means we could sleep walk into importing a new variant, one (or more of which) may escape the vaccines we have. Lots of people from the uk travelling abroad right now would be extreme folly in my opinion. We should also be sharing or expertise on gene analysis with other countries- it really is in our best interests.
Epidemiologically speaking, travel bans that are based on the traffic light system are a farce and will not prevent importation and spread of new cases/new variants. It works on historical (even if recent data), which quickly becomes outdated, and government takes too long to put restrictions in place when problems arise. It also does nothing to stop people entering from or going to a high risk zone, just means they have to take a circuitous route to do so.
The only travel restrictions that work are complete ones that have exceptions for essential workers (e.g. lorry drivers) or in compassionate grounds. Those who must travel for work purposes are screened regularly. Those travelling on compassionate grounds must be quarantined (properly, monitored and enforced- not the unregulated, unmonitored pretence we’ve had before because data shows most people who were supposed to quarantine either did not bother or did not do it properly).
Foreign travel this summer should not be counted upon. It’s not essential for the majority. Those who have good reason can go abroad but holidays abroad are not essential snd mass holidaying abroad could threaten the progress we have made so far.