Power strips.

I bought this one, and it does charge devices REALLY fast:
https://www.amazon.com/gp/product/B00P936188/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Since most electronics are dual voltage you shouldn’t need a converter. This extension cord worked good on my recent trip to charge phones, Mophies and cameras. You just need the correct plug adapter. You’ll want to pop off the child protector plate on the plug end to make plugging things in easier (if you’re not handy, one of the product reviews talk about it or find someone who knows electricity. I luckily have a very handy hubby.)
https://www.amazon.com/UPWADE-Protector-Charging-Multi-Port-Portable/dp/B06XFZPQSM/ref=mp_s_a_1_2_sspa?keywords=travel+extension+cord+with+usb+ports&qid=1560375740&s=gateway&sr=8-2-spons&psc=1
Suggestion: take at least 3 plug adapters because you forget them in the wall.

I ordered the Anker strip that was recommended. I like that brand for use with Apple products.

Thank you!

We travel with 4 devices and bring 2 of these- along with a few plug adapters and extra USB adapter although we've never really needed those or use them

https://www.amazon.com/OREI-3-4A-Plug-Adapter-Europe/dp/B01A5FD8HQ

they also make one for UK

Glad to hear the Anker strip works well with Apple Products. Not only that but it looks lightweight, & charges quickly.

Again, I use Anker - the powerline II. None are perfect.

I'm a huge fan of this one. It works in both England and Europe (and you can use it in the US and Australia) and is very small and light. It also has 2 USB ports on the side. You just twist it for whatever country you are in.
https://www.amazon.com/gp/product/B0774YQPKF/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

I also have an Anker that I use. It can be plugged into this unit.