Best newborn / toddler buggy for going up steps?

[violetlights]

It's only a few steps (5) up to our flat (and I'm thinking the toddler will get out and walk up...) but because I had a horrible first birth and was in pain / had no strength for weeks (months...?) I'm worrying about how I'm going to get newborn + toddler up and down them.

I'm presuming a double would be too heavy so I was thinking a single pushchair with a second seat (we do a lot of walking). (I love the idea of a buggy board but not convinced my DS1 has the discipline required to stay on... Plus it'll be winter so want the option for him to have a cosy sit down).

My current bugaboo bee is rubbish at steps (I guess due to its small wheels.)

So... Anyone have (or can recommend) a carrycot buggy with second seat option that could be dragged up a few steps without breaking your back? Do you think air-filled tires would be useful?

I keep going round in circles so any advice will be gratefully received! Thank you!

My friend lives two floors and has a newborn and 15 month old, she uses a baby jogger city select and loves it. Finds it easy enough to get upstairs and both babs look very comfy.

Bumbleride with toddler seat?

The Micralite Twofold?

Oh many thanks all! Had a busy evening so will look up your suggestions tomorrow. eatingforonemore - thank you! I was considering the bj select but didn't know anyone who had one, so great to have a personal recommendation.

Art and Tiggy - thanks! I hadn't considered either of those and look forward to investigating tomorrow.