reallytired's post is totally wrong.
The tenants have signed up to a number of legal obligations.I'm assuming this a Standard Assured Shorthold Tenancy Agreement.
One of them involves them allowing reasonable access to the property by you, as the landlord. Legally, you have to only give 24 hours notice. This includes notice for contractors, essential house maintenance like gas safety checks, boilers, electrics etc.
Your tenants are acting illegally by changing the locks without your permission. You can charge them to have them changed back again from their deposit, so deduct the cost accordingly.
I personally would find out why are acting in this manner which sounds very strange indeed. Perhaps there is some dispute between themselves and your agent that you are unaware of?
We privately rent and have three children under 5. We have been with some terrible agents who do nothing about basic repairs and not even bothered to contact the landlord.
I would try to speak to them personally to come to an amicable agreement.
Alternatively, you could enforce Section 21
if they really cause trouble and do something silly like squat. I'm not advocating it as a method, just be aware you do have the power to evict using this clause if they retreat on their notice and decide to stay out.
I'm sure that with a baby they should be reasonable. Their actions are illegal.You do not need to negotiate with them on when you can do viewings - sorry but it's 24 hours notice as per contract. The agent should have informed you of this.
You can also threaten to write them a poor reference for their next prospective landlord (if they are still going to rent). This should bring them round. If you can PROVE they have committed these illegal offenses against you as a landlord- agents and landlords will steer well clear. As tenants they should be aware of this. Getting a decent place when you have a child is so important, so they are treading on very thin ice.
We were actually harassed by our previous landlord whose behviour was beyond the pale- attempting to threatening to turn off our electricity mid-winter, not replacing a broken washing machine under contract to him, removing all white goods from our contract and demanding we buy his shoddy appliances, doing one inspection after 18 months and then giving us specific times and dates for minor work like replacing light bulbs to be carried out. Criticising us for dust on OUR lampshades, never doing any basic repairs etc etc. We paid our rent on time, kept the house tidy but dared to complain about the lack of basic repairs.
The landlord placed a HUGE strain on us with the stress and it is a long story but we do actually have a strong case prepared against him prepared by a lawyer but the cost of further action is prohibitive at the moment. He never took into account that we had small children at any stage. Legally, as a landlord, you don't have to as far as I'm aware. But morally you should and you seem to be very caring regarding your tenant's needs, therefore I can see no logical reason for their actions.
We are so happy now with a good agent and excellent landlord so it was worth the hassle of mioving when we couldn't really afford to.
I know my suggestions sound heavy handed but you have more power as a landlord. Even though we were attacked on all levels, we never stopped the landlord from entering with 24 hours notice and would never have even considered changing the locks. It is within YOUR RIGHTS to have reasonable access to your property.
So reallytired- THAT is a bad landlord , not this poor woman who is sounds like she is trying to be really accommodating.
There are some good landlord forums which may be able to help and Shelter perhaps can give you advice. They are normally very good and might help you negotiate.
Good luck