Pets at Home Group PLC (LSE:PETS) will be one of those getting attention ahead of the busier diary later in the week. A third-quarter update will see investors likely to be focused on whether the pressure on the retailer's profit margins has eased since November. Among the small caps, there may be extra attention on ITM Power PLC (AIM:ITM) after the hydrogen electrolysis specialist appointed Dennis Schulz as its new chief executive.