Car seat (7mth baby), bottle warmer & sanitizer (Charlton SE7)

My son is visiting me 16th to 28th August with his 7mth old daughter.
We need a suitable car seat, bottle warmer and sanitizer.
If you have any of these to pass on to us , we'd be very grateful.
I'm in Charlton, sister is in Ilford, so anywhere near our locations is good.
Thank you.

       
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