Question: If we really need to go to someone else's home, what can we do to protect ourselves from COVID-19 as much as possible?

Answer passage (source: UK):
page_title: Construction and other outdoor work
section_headers: 6. Personal protective equipment (PPE) and face coverings
6.1 Face coverings
section_content: There are some circumstances when wearing a face covering may be marginally
beneficial as a precautionary measure. The evidence suggests that wearing a
face covering does not protect you, but it may protect others if you are
infected but have not developed symptoms.
A face covering can be very simple and may be worn in enclosed spaces where
social distancing isn’t possible. It just needs to cover your mouth and nose.
It is not the same as a face mask, such as the surgical masks or respirators
used by health and care workers. Similarly, face coverings are not the same as
the PPE used to manage risks like dust and spray in an industrial context.
Supplies of PPE, including face masks, must continue to be reserved for those
who need them to protect against risks in their workplace, such as health and
care workers, and those in industrial settings like those exposed to dust
hazards.
It is important to know that the evidence of the benefit of using a face
covering to protect others is weak and the effect is likely to be small,
therefore face coverings are not a replacement for the other ways of managing
risk, including minimising time spent in contact, using fixed teams and
partnering for close-up work, and increasing hand and surface washing. These
other measures remain the best ways of managing risk in the workplace and
government would therefore not expect to see employers relying on face
coverings as risk management for the purpose of their health and safety
assessments.
Wearing a face covering is optional and is not required by law, including in
the workplace. If you choose to wear one, it is important to use face
coverings properly and wash your hands before putting them on and taking them
off. You should be prepared to remove your face covering if asked to do so by
police officers and staff for the purposes of identification.
Employers should support their workers in using face coverings safely if they
choose to wear one. This means telling workers:

wash your hands thoroughly with soap and water for 20 seconds or use hand sanitiser before putting a face covering on, and after removing it
when wearing a face covering, avoid touching your face or face covering, as you could contaminate them with germs from your hands
change your face covering if it becomes damp or if you’ve touched it
continue to wash your hands regularly
change and wash your face covering daily
if the material is washable, wash in line with manufacturer’s instructions. If it’s not washable, dispose of it carefully in your usual waste
practise social distancing wherever possible

You can make face-coverings at home. Find guidance on how to wear and make a
face-covering on GOV.UK.
*[PPE]: Personal protective equipment

Reviewer feedback on this answer:
This directly answer the question on how to keep yourself safe if you are visiting someone house.
This only discusses the use of face masks and does not address going into someone's home at all.

Reviewer ratings:
Excellent
Bad

Answer passage (source: UK):
page_title: Guidance Stay at home: guidance for households with possible or confirmed coronavirus (COVID-19) infection
section_headers: While you are self-isolating, make sure you do the following things
Face coverings
section_content: Used correctly, a face covering may help to protect others by reducing the
transmission of coronavirus (COVID-19).
If you have possible or confirmed coronavirus (COVID-19) and you live with
others, consider using a face covering inside your home when spending time in
shared parts of the household, in addition to avoiding contact with other
members of the household as much as possible. You must still stay at home for
at least 7 days from when the symptoms started and wearing a face covering
does not replace this.
Further guidance on the use of face
coverings is available along
with instructions on how to make your own face
covering.

Reviewer feedback on this answer:
This answer is only retaining to face mask and what to do if you have symptoms.
This gives information for keeping people you live with safe if you are infected, and does not discuss going to someone's home.

Reviewer ratings:
Bad
Bad

Answer passage (source: UK):
page_title: Guidance Stay at home: guidance for households with possible or confirmed coronavirus (COVID-19) infection
section_headers: While you are self-isolating, make sure you do the following things
If you have a clinically vulnerable or clinically extremely vulnerable person living with you
section_content: Where possible, arrange for anyone who is clinically
vulnerable or clinically
extremely vulnerable to
move out of your home, to stay with friends or family for the duration of your
home isolation period.
If you cannot arrange for vulnerable people to move out of your home, stay
away from them as much as possible, following the guidance
here. For the clinically
extremely vulnerable please follow the Shielding
guidance.
Those who are clinically vulnerable or clinically extremely vulnerable should
be supported to take precautions to minimise their contact with other people
in your household, regardless of whether others have symptoms or not. They
should minimise time spent in shared spaces such as kitchens, bathrooms and
sitting areas. Any shared spaces should be well ventilated.
If they can, clinically vulnerable or clinically extremely vulnerable people
should use a separate bathroom from the rest of the household. If this is not
possible, consider drawing up a rota for bathing, with the clinically
vulnerable or clinically extremely vulnerable person using the facilities
first. They should use separate towels from the rest of the household, both
for drying themselves after bathing or showering and when washing their hands.
If they can, clinically vulnerable and clinically extremely vulnerable members
of the household should have their meals in their own rooms. If you have one,
use a dishwasher to clean and dry the family’s used crockery and cutlery. If
this is not possible, wash them using your usual washing up liquid and warm
water and dry them thoroughly. If the clinically vulnerable or clinically
extremely vulnerable person is using their own utensils, remember to use a
separate tea towel for drying these.
We understand that it will be difficult for some people to separate themselves
from others at home. You must do your very best to follow this guidance and
everyone in your household should regularly wash their hands, avoid touching
their face, and clean frequently touched surfaces.

Reviewer feedback on this answer:
This answer is more about protecting vulnerable persons than visiting people house
This recommends that clinically vulnerable people try to move out of the home if someone gets infected, and offers advice to keep them safe.

Reviewer ratings:
Could be Improved
Bad